Update switch statements

67 files changed, 1167 insertions, 2392 deletions

diff --git a/src/main/java/org/traccar/BaseProtocolDecoder.java b/src/main/java/org/traccar/BaseProtocolDecoder.java
index 2f9c75ec2..5e3f668ed 100644
--- a/src/main/java/org/traccar/BaseProtocolDecoder.java
+++ b/src/main/java/org/traccar/BaseProtocolDecoder.java
@@ -108,17 +108,12 @@ public abstract class BaseProtocolDecoder extends ExtendedObjectDecoder {
     }
 
     protected double convertSpeed(double value, String defaultUnits) {
-        switch (getConfig().getString(getProtocolName() + ".speed", defaultUnits)) {
-            case "kmh":
-                return UnitsConverter.knotsFromKph(value);
-            case "mps":
-                return UnitsConverter.knotsFromMps(value);
-            case "mph":
-                return UnitsConverter.knotsFromMph(value);
-            case "kn":
-            default:
-                return value;
-        }
+        return switch (getConfig().getString(getProtocolName() + ".speed", defaultUnits)) {
+            case "kmh" -> UnitsConverter.knotsFromKph(value);
+            case "mps" -> UnitsConverter.knotsFromMps(value);
+            case "mph" -> UnitsConverter.knotsFromMph(value);
+            default -> value;
+        };
     }
 
     protected TimeZone getTimeZone(long deviceId) {
diff --git a/src/main/java/org/traccar/MainModule.java b/src/main/java/org/traccar/MainModule.java
index 806e6da18..c7b74d049 100644
--- a/src/main/java/org/traccar/MainModule.java
+++ b/src/main/java/org/traccar/MainModule.java
@@ -206,69 +206,28 @@ public class MainModule extends AbstractModule {
             AddressFormat addressFormat = formatString != null ? new AddressFormat(formatString) : new AddressFormat();
 
             int cacheSize = config.getInteger(Keys.GEOCODER_CACHE_SIZE);
-            Geocoder geocoder;
-            switch (type) {
-                case "pluscodes":
-                    geocoder = new PlusCodesGeocoder();
-                    break;
-                case "nominatim":
-                    geocoder = new NominatimGeocoder(client, url, key, language, cacheSize, addressFormat);
-                    break;
-                case "locationiq":
-                    geocoder = new LocationIqGeocoder(client, url, key, language, cacheSize, addressFormat);
-                    break;
-                case "gisgraphy":
-                    geocoder = new GisgraphyGeocoder(client, url, cacheSize, addressFormat);
-                    break;
-                case "mapquest":
-                    geocoder = new MapQuestGeocoder(client, url, key, cacheSize, addressFormat);
-                    break;
-                case "opencage":
-                    geocoder = new OpenCageGeocoder(client, url, key, language, cacheSize, addressFormat);
-                    break;
-                case "bingmaps":
-                    geocoder = new BingMapsGeocoder(client, url, key, cacheSize, addressFormat);
-                    break;
-                case "factual":
-                    geocoder = new FactualGeocoder(client, url, key, cacheSize, addressFormat);
-                    break;
-                case "geocodefarm":
-                    geocoder = new GeocodeFarmGeocoder(client, key, language, cacheSize, addressFormat);
-                    break;
-                case "geocodexyz":
-                    geocoder = new GeocodeXyzGeocoder(client, key, cacheSize, addressFormat);
-                    break;
-                case "ban":
-                    geocoder = new BanGeocoder(client, cacheSize, addressFormat);
-                    break;
-                case "here":
-                    geocoder = new HereGeocoder(client, url, key, language, cacheSize, addressFormat);
-                    break;
-                case "mapmyindia":
-                    geocoder = new MapmyIndiaGeocoder(client, url, key, cacheSize, addressFormat);
-                    break;
-                case "tomtom":
-                    geocoder = new TomTomGeocoder(client, url, key, cacheSize, addressFormat);
-                    break;
-                case "positionstack":
-                    geocoder = new PositionStackGeocoder(client, key, cacheSize, addressFormat);
-                    break;
-                case "mapbox":
-                    geocoder = new MapboxGeocoder(client, key, cacheSize, addressFormat);
-                    break;
-                case "maptiler":
-                    geocoder = new MapTilerGeocoder(client, key, cacheSize, addressFormat);
-                    break;
-                case "geoapify":
-                    geocoder = new GeoapifyGeocoder(client, key, language, cacheSize, addressFormat);
-                    break;
-                case "geocodejson":
-                    geocoder = new GeocodeJsonGeocoder(client, url, key, language, cacheSize, addressFormat);
-                    break;
-                default:
-                    geocoder = new GoogleGeocoder(client, key, language, cacheSize, addressFormat);
-                    break;
-            }
+            Geocoder geocoder = switch (type) {
+                case "pluscodes" -> new PlusCodesGeocoder();
+                case "nominatim" -> new NominatimGeocoder(client, url, key, language, cacheSize, addressFormat);
+                case "locationiq" -> new LocationIqGeocoder(client, url, key, language, cacheSize, addressFormat);
+                case "gisgraphy" -> new GisgraphyGeocoder(client, url, cacheSize, addressFormat);
+                case "mapquest" -> new MapQuestGeocoder(client, url, key, cacheSize, addressFormat);
+                case "opencage" -> new OpenCageGeocoder(client, url, key, language, cacheSize, addressFormat);
+                case "bingmaps" -> new BingMapsGeocoder(client, url, key, cacheSize, addressFormat);
+                case "factual" -> new FactualGeocoder(client, url, key, cacheSize, addressFormat);
+                case "geocodefarm" -> new GeocodeFarmGeocoder(client, key, language, cacheSize, addressFormat);
+                case "geocodexyz" -> new GeocodeXyzGeocoder(client, key, cacheSize, addressFormat);
+                case "ban" -> new BanGeocoder(client, cacheSize, addressFormat);
+                case "here" -> new HereGeocoder(client, url, key, language, cacheSize, addressFormat);
+                case "mapmyindia" -> new MapmyIndiaGeocoder(client, url, key, cacheSize, addressFormat);
+                case "tomtom" -> new TomTomGeocoder(client, url, key, cacheSize, addressFormat);
+                case "positionstack" -> new PositionStackGeocoder(client, key, cacheSize, addressFormat);
+                case "mapbox" -> new MapboxGeocoder(client, key, cacheSize, addressFormat);
+                case "maptiler" -> new MapTilerGeocoder(client, key, cacheSize, addressFormat);
+                case "geoapify" -> new GeoapifyGeocoder(client, key, language, cacheSize, addressFormat);
+                case "geocodejson" -> new GeocodeJsonGeocoder(client, url, key, language, cacheSize, addressFormat);
+                default -> new GoogleGeocoder(client, key, language, cacheSize, addressFormat);
+            };
             geocoder.setStatisticsManager(statisticsManager);
             return geocoder;
         }
@@ -282,14 +241,11 @@ public class MainModule extends AbstractModule {
             String type = config.getString(Keys.GEOLOCATION_TYPE, "google");
             String url = config.getString(Keys.GEOLOCATION_URL);
             String key = config.getString(Keys.GEOLOCATION_KEY);
-            switch (type) {
-                case "opencellid":
-                    return new OpenCellIdGeolocationProvider(client, url, key);
-                case "unwired":
-                    return new UnwiredGeolocationProvider(client, url, key);
-                default:
-                    return new GoogleGeolocationProvider(client, key);
-            }
+            return switch (type) {
+                case "opencellid" -> new OpenCellIdGeolocationProvider(client, url, key);
+                case "unwired" -> new UnwiredGeolocationProvider(client, url, key);
+                default -> new GoogleGeolocationProvider(client, key);
+            };
         }
         return null;
     }
@@ -300,11 +256,10 @@ public class MainModule extends AbstractModule {
         if (config.getBoolean(Keys.SPEED_LIMIT_ENABLE)) {
             String type = config.getString(Keys.SPEED_LIMIT_TYPE, "overpass");
             String url = config.getString(Keys.SPEED_LIMIT_URL);
-            switch (type) {
-                case "overpass":
-                default:
-                    return new OverpassSpeedLimitProvider(config, client, url);
-            }
+            return switch (type) {
+                case "overpass" -> new OverpassSpeedLimitProvider(config, client, url);
+                default -> throw new IllegalArgumentException("Unknown speed limit provider");
+            };
         }
         return null;
     }
@@ -372,14 +327,11 @@ public class MainModule extends AbstractModule {
     public static BroadcastService provideBroadcastService(
             Config config, ObjectMapper objectMapper) throws IOException {
         if (config.hasKey(Keys.BROADCAST_TYPE)) {
-            switch (config.getString(Keys.BROADCAST_TYPE)) {
-                case "multicast":
-                    return new MulticastBroadcastService(config, objectMapper);
-                case "redis":
-                    return new RedisBroadcastService(config, objectMapper);
-                default:
-                    break;
-            }
+            return switch (config.getString(Keys.BROADCAST_TYPE)) {
+                case "multicast" -> new MulticastBroadcastService(config, objectMapper);
+                case "redis" -> new RedisBroadcastService(config, objectMapper);
+                default -> new NullBroadcastService();
+            };
         }
         return new NullBroadcastService();
     }
@@ -389,17 +341,12 @@ public class MainModule extends AbstractModule {
     public static EventForwarder provideEventForwarder(Config config, Client client, ObjectMapper objectMapper) {
         if (config.hasKey(Keys.EVENT_FORWARD_URL)) {
             String forwardType = config.getString(Keys.EVENT_FORWARD_TYPE);
-            switch (forwardType) {
-                case "amqp":
-                    return new EventForwarderAmqp(config, objectMapper);
-                case "kafka":
-                    return new EventForwarderKafka(config, objectMapper);
-                case "mqtt":
-                    return new EventForwarderMqtt(config, objectMapper);
-                case "json":
-                default:
-                    return new EventForwarderJson(config, client);
-            }
+            return switch (forwardType) {
+                case "amqp" -> new EventForwarderAmqp(config, objectMapper);
+                case "kafka" -> new EventForwarderKafka(config, objectMapper);
+                case "mqtt" -> new EventForwarderMqtt(config, objectMapper);
+                default -> new EventForwarderJson(config, client);
+            };
         }
         return null;
     }
@@ -408,21 +355,14 @@ public class MainModule extends AbstractModule {
     @Provides
     public static PositionForwarder providePositionForwarder(Config config, Client client, ObjectMapper objectMapper) {
         if (config.hasKey(Keys.FORWARD_URL)) {
-            switch (config.getString(Keys.FORWARD_TYPE)) {
-                case "json":
-                    return new PositionForwarderJson(config, client, objectMapper);
-                case "amqp":
-                    return new PositionForwarderAmqp(config, objectMapper);
-                case "kafka":
-                    return new PositionForwarderKafka(config, objectMapper);
-                case "mqtt":
-                    return new PositionForwarderMqtt(config, objectMapper);
-                case "redis":
-                    return new PositionForwarderRedis(config, objectMapper);
-                case "url":
-                default:
-                    return new PositionForwarderUrl(config, client, objectMapper);
-            }
+            return switch (config.getString(Keys.FORWARD_TYPE)) {
+                case "json" -> new PositionForwarderJson(config, client, objectMapper);
+                case "amqp" -> new PositionForwarderAmqp(config, objectMapper);
+                case "kafka" -> new PositionForwarderKafka(config, objectMapper);
+                case "mqtt" -> new PositionForwarderMqtt(config, objectMapper);
+                case "redis" -> new PositionForwarderRedis(config, objectMapper);
+                default -> new PositionForwarderUrl(config, client, objectMapper);
+            };
         }
         return null;
     }
diff --git a/src/main/java/org/traccar/WindowsService.java b/src/main/java/org/traccar/WindowsService.java
index 08eba25a6..61606c5be 100644
--- a/src/main/java/org/traccar/WindowsService.java
+++ b/src/main/java/org/traccar/WindowsService.java
@@ -206,16 +206,11 @@ public abstract class WindowsService {
     private final class ServiceControl implements HandlerEx {
 
         public int callback(int dwControl, int dwEventType, Pointer lpEventData, Pointer lpContext) {
-            switch (dwControl) {
-                case Winsvc.SERVICE_CONTROL_STOP:
-                case Winsvc.SERVICE_CONTROL_SHUTDOWN:
-                    reportStatus(Winsvc.SERVICE_STOP_PENDING, WinError.NO_ERROR, 5000);
-                    synchronized (waitObject) {
-                        waitObject.notifyAll();
-                    }
-                    break;
-                default:
-                    break;
+            if (dwControl == Winsvc.SERVICE_CONTROL_STOP || dwControl == Winsvc.SERVICE_CONTROL_SHUTDOWN) {
+                reportStatus(Winsvc.SERVICE_STOP_PENDING, WinError.NO_ERROR, 5000);
+                synchronized (waitObject) {
+                    waitObject.notifyAll();
+                }
             }
             return WinError.NO_ERROR;
         }
diff --git a/src/main/java/org/traccar/api/resource/AttributeResource.java b/src/main/java/org/traccar/api/resource/AttributeResource.java
index 52c4d6324..8debb2e50 100644
--- a/src/main/java/org/traccar/api/resource/AttributeResource.java
+++ b/src/main/java/org/traccar/api/resource/AttributeResource.java
@@ -62,16 +62,10 @@ public class AttributeResource extends ExtendedObjectResource<Attribute> {
 
         Object result = computedAttributesHandler.computeAttribute(entity, position);
         if (result != null) {
-            switch (entity.getType()) {
-                case "number":
-                    Number numberValue = (Number) result;
-                    return Response.ok(numberValue).build();
-                case "boolean":
-                    Boolean booleanValue = (Boolean) result;
-                    return Response.ok(booleanValue).build();
-                default:
-                    return Response.ok(result.toString()).build();
-            }
+            return switch (entity.getType()) {
+                case "number", "boolean" -> Response.ok(result).build();
+                default -> Response.ok(result.toString()).build();
+            };
         } else {
             return Response.noContent().build();
         }
diff --git a/src/main/java/org/traccar/api/resource/DeviceResource.java b/src/main/java/org/traccar/api/resource/DeviceResource.java
index 61d96669e..4be8dbb12 100644
--- a/src/main/java/org/traccar/api/resource/DeviceResource.java
+++ b/src/main/java/org/traccar/api/resource/DeviceResource.java
@@ -174,20 +174,14 @@ public class DeviceResource extends BaseObjectResource<Device> {
     }
 
     private String imageExtension(String type) {
-        switch (type) {
-            case "image/jpeg":
-                return "jpg";
-            case "image/png":
-                return "png";
-            case "image/gif":
-                return "gif";
-            case "image/webp":
-                return "webp";
-            case "image/svg+xml":
-                return "svg";
-            default:
-                throw new IllegalArgumentException("Unsupported image type");
-        }
+        return switch (type) {
+            case "image/jpeg" -> "jpg";
+            case "image/png" -> "png";
+            case "image/gif" -> "gif";
+            case "image/webp" -> "webp";
+            case "image/svg+xml" -> "svg";
+            default -> throw new IllegalArgumentException("Unsupported image type");
+        };
     }
 
     @Path("{id}/image")
diff --git a/src/main/java/org/traccar/database/LdapProvider.java b/src/main/java/org/traccar/database/LdapProvider.java
index d517294b8..549b68e6c 100644
--- a/src/main/java/org/traccar/database/LdapProvider.java
+++ b/src/main/java/org/traccar/database/LdapProvider.java
@@ -189,23 +189,12 @@ public class LdapProvider {
         for (int i = 0; i < input.length(); i++) {
             char c = input.charAt(i);
             switch (c) {
-                case '\\':
-                    sb.append("\\5c");
-                    break;
-                case '*':
-                    sb.append("\\2a");
-                    break;
-                case '(':
-                    sb.append("\\28");
-                    break;
-                case ')':
-                    sb.append("\\29");
-                    break;
-                case '\0':
-                    sb.append("\\00");
-                    break;
-                default:
-                    sb.append(c);
+                case '\\' -> sb.append("\\5c");
+                case '*' -> sb.append("\\2a");
+                case '(' -> sb.append("\\28");
+                case ')' -> sb.append("\\29");
+                case '\0' -> sb.append("\\00");
+                default -> sb.append(c);
             }
         }
         return sb.toString();
diff --git a/src/main/java/org/traccar/geocoder/MapTilerGeocoder.java b/src/main/java/org/traccar/geocoder/MapTilerGeocoder.java
index 24c9da2ad..11394339a 100644
--- a/src/main/java/org/traccar/geocoder/MapTilerGeocoder.java
+++ b/src/main/java/org/traccar/geocoder/MapTilerGeocoder.java
@@ -66,9 +66,4 @@ public class MapTilerGeocoder extends JsonGeocoder {
         return null;
     }
 
-    @Override
-    protected String parseError(JsonObject json) {
-        return null;
-    }
-
 }
diff --git a/src/main/java/org/traccar/handler/ComputedAttributesHandler.java b/src/main/java/org/traccar/handler/ComputedAttributesHandler.java
index b7d7a5ed5..f4079f127 100644
--- a/src/main/java/org/traccar/handler/ComputedAttributesHandler.java
+++ b/src/main/java/org/traccar/handler/ComputedAttributesHandler.java
@@ -150,44 +150,29 @@ public class ComputedAttributesHandler extends BasePositionHandler {
                     Object result = computeAttribute(attribute, position);
                     if (result != null) {
                         switch (attribute.getAttribute()) {
-                            case "valid":
-                                position.setValid((Boolean) result);
-                                break;
-                            case "latitude":
-                                position.setLatitude(((Number) result).doubleValue());
-                                break;
-                            case "longitude":
-                                position.setLongitude(((Number) result).doubleValue());
-                                break;
-                            case "altitude":
-                                position.setAltitude(((Number) result).doubleValue());
-                                break;
-                            case "speed":
-                                position.setSpeed(((Number) result).doubleValue());
-                                break;
-                            case "course":
-                                position.setCourse(((Number) result).doubleValue());
-                                break;
-                            case "address":
-                                position.setAddress((String) result);
-                                break;
-                            case "accuracy":
-                                position.setAccuracy(((Number) result).doubleValue());
-                                break;
-                            default:
+                            case "valid" -> position.setValid((Boolean) result);
+                            case "latitude" -> position.setLatitude(((Number) result).doubleValue());
+                            case "longitude" -> position.setLongitude(((Number) result).doubleValue());
+                            case "altitude" -> position.setAltitude(((Number) result).doubleValue());
+                            case "speed" -> position.setSpeed(((Number) result).doubleValue());
+                            case "course" -> position.setCourse(((Number) result).doubleValue());
+                            case "address" -> position.setAddress((String) result);
+                            case "accuracy" -> position.setAccuracy(((Number) result).doubleValue());
+                            default -> {
                                 switch (attribute.getType()) {
-                                    case "number":
+                                    case "number" -> {
                                         Number numberValue = (Number) result;
                                         position.getAttributes().put(attribute.getAttribute(), numberValue);
-                                        break;
-                                    case "boolean":
+                                    }
+                                    case "boolean" -> {
                                         Boolean booleanValue = (Boolean) result;
                                         position.getAttributes().put(attribute.getAttribute(), booleanValue);
-                                        break;
-                                    default:
+                                    }
+                                    default -> {
                                         position.getAttributes().put(attribute.getAttribute(), result.toString());
+                                    }
                                 }
-                                break;
+                            }
                         }
                     } else {
                         position.getAttributes().remove(attribute.getAttribute());
diff --git a/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java b/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java
index 573ad4ad6..7fc6086aa 100644
--- a/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java
+++ b/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java
@@ -57,16 +57,12 @@ public class MaintenanceEventHandler extends BaseEventHandler {
     }
 
     private double getValue(Position position, String type) {
-        switch (type) {
-            case "serverTime":
-                return position.getServerTime().getTime();
-            case "deviceTime":
-                return position.getDeviceTime().getTime();
-            case "fixTime":
-                return position.getFixTime().getTime();
-            default:
-                return position.getDouble(type);
-        }
+        return switch (type) {
+            case "serverTime" -> position.getServerTime().getTime();
+            case "deviceTime" -> position.getDeviceTime().getTime();
+            case "fixTime" -> position.getFixTime().getTime();
+            default -> position.getDouble(type);
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/helper/Log.java b/src/main/java/org/traccar/helper/Log.java
index 6c6d49550..c68198542 100644
--- a/src/main/java/org/traccar/helper/Log.java
+++ b/src/main/java/org/traccar/helper/Log.java
@@ -126,21 +126,13 @@ public final class Log {
         }
 
         private static String formatLevel(Level level) {
-            switch (level.getName()) {
-                case "FINEST":
-                    return "TRACE";
-                case "FINER":
-                case "FINE":
-                case "CONFIG":
-                    return "DEBUG";
-                case "INFO":
-                    return "INFO";
-                case "WARNING":
-                    return "WARN";
-                case "SEVERE":
-                default:
-                    return "ERROR";
-            }
+            return switch (level.getName()) {
+                case "FINEST" -> "TRACE";
+                case "FINER", "FINE", "CONFIG" -> "DEBUG";
+                case "INFO" -> "INFO";
+                case "WARNING" -> "WARN";
+                default -> "ERROR";
+            };
         }
 
         @Override
@@ -152,7 +144,7 @@ public final class Log {
             }
 
             if (record.getThrown() != null) {
-                if (message.length() > 0) {
+                if (!message.isEmpty()) {
                     message.append(" - ");
                 }
                 if (fullStackTraces) {
diff --git a/src/main/java/org/traccar/helper/ObdDecoder.java b/src/main/java/org/traccar/helper/ObdDecoder.java
index 3cbae334a..091747225 100644
--- a/src/main/java/org/traccar/helper/ObdDecoder.java
+++ b/src/main/java/org/traccar/helper/ObdDecoder.java
@@ -30,17 +30,13 @@ public final class ObdDecoder {
     private static final int MODE_CODES = 0x03;
 
     public static Map.Entry<String, Object> decode(int mode, String value) {
-        switch (mode) {
-            case MODE_CURRENT:
-            case MODE_FREEZE_FRAME:
-                return decodeData(
-                        Integer.parseInt(value.substring(0, 2), 16),
-                        Long.parseLong(value.substring(2), 16), true);
-            case MODE_CODES:
-                return decodeCodes(value);
-            default:
-                return null;
-        }
+        return switch (mode) {
+            case MODE_CURRENT, MODE_FREEZE_FRAME -> decodeData(
+                    Integer.parseInt(value.substring(0, 2), 16),
+                    Long.parseLong(value.substring(2), 16), true);
+            case MODE_CODES -> decodeCodes(value);
+            default -> null;
+        };
     }
 
     private static Map.Entry<String, Object> createEntry(String key, Object value) {
@@ -53,7 +49,7 @@ public final class ObdDecoder {
             int numValue = Integer.parseInt(value.substring(i * 4, (i + 1) * 4), 16);
             codes.append(' ').append(decodeCode(numValue));
         }
-        if (codes.length() > 0) {
+        if (!codes.isEmpty()) {
             return createEntry(Position.KEY_DTCS, codes.toString().trim());
         } else {
             return null;
@@ -61,49 +57,29 @@ public final class ObdDecoder {
     }
 
     public static String decodeCode(int value) {
-        char prefix;
-        switch (value >> 14) {
-            case 1:
-                prefix = 'C';
-                break;
-            case 2:
-                prefix = 'B';
-                break;
-            case 3:
-                prefix = 'U';
-                break;
-            default:
-                prefix = 'P';
-                break;
-        }
+        char prefix = switch (value >> 14) {
+            case 1 -> 'C';
+            case 2 -> 'B';
+            case 3 -> 'U';
+            default -> 'P';
+        };
         return String.format("%c%04X", prefix, value & 0x3FFF);
     }
 
     public static Map.Entry<String, Object> decodeData(int pid, long value, boolean convert) {
-        switch (pid) {
-            case 0x04:
-                return createEntry(Position.KEY_ENGINE_LOAD, convert ? value * 100 / 255 : value);
-            case 0x05:
-                return createEntry(Position.KEY_COOLANT_TEMP, convert ? value - 40 : value);
-            case 0x0B:
-                return createEntry("mapIntake", value);
-            case 0x0C:
-                return createEntry(Position.KEY_RPM, convert ? value / 4 : value);
-            case 0x0D:
-                return createEntry(Position.KEY_OBD_SPEED, value);
-            case 0x0F:
-                return createEntry("intakeTemp", convert ? value - 40 : value);
-            case 0x11:
-                return createEntry(Position.KEY_THROTTLE, convert ? value * 100 / 255 : value);
-            case 0x21:
-                return createEntry("milDistance", value);
-            case 0x2F:
-                return createEntry(Position.KEY_FUEL_LEVEL, convert ? value * 100 / 255 : value);
-            case 0x31:
-                return createEntry("clearedDistance", value);
-            default:
-                return null;
-        }
+        return switch (pid) {
+            case 0x04 -> createEntry(Position.KEY_ENGINE_LOAD, convert ? value * 100 / 255 : value);
+            case 0x05 -> createEntry(Position.KEY_COOLANT_TEMP, convert ? value - 40 : value);
+            case 0x0B -> createEntry("mapIntake", value);
+            case 0x0C -> createEntry(Position.KEY_RPM, convert ? value / 4 : value);
+            case 0x0D -> createEntry(Position.KEY_OBD_SPEED, value);
+            case 0x0F -> createEntry("intakeTemp", convert ? value - 40 : value);
+            case 0x11 -> createEntry(Position.KEY_THROTTLE, convert ? value * 100 / 255 : value);
+            case 0x21 -> createEntry("milDistance", value);
+            case 0x2F -> createEntry(Position.KEY_FUEL_LEVEL, convert ? value * 100 / 255 : value);
+            case 0x31 -> createEntry("clearedDistance", value);
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/AdmProtocolDecoder.java b/src/main/java/org/traccar/protocol/AdmProtocolDecoder.java
index 1f940f7e2..3eab90988 100644
--- a/src/main/java/org/traccar/protocol/AdmProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/AdmProtocolDecoder.java
@@ -108,38 +108,19 @@ public class AdmProtocolDecoder extends BaseProtocolDecoder {
                 int endIndex = buf.readerIndex() + buf.readUnsignedByte();
                 while (buf.readerIndex() < endIndex) {
                     int mask = buf.readUnsignedByte();
-                    long value;
-                    switch (BitUtil.from(mask, 6)) {
-                        case 3:
-                            value = buf.readLongLE();
-                            break;
-                        case 2:
-                            value = buf.readUnsignedIntLE();
-                            break;
-                        case 1:
-                            value = buf.readUnsignedShortLE();
-                            break;
-                        default:
-                            value = buf.readUnsignedByte();
-                            break;
-                    }
+                    long value = switch (BitUtil.from(mask, 6)) {
+                        case 3 -> buf.readLongLE();
+                        case 2 -> buf.readUnsignedIntLE();
+                        case 1 -> buf.readUnsignedShortLE();
+                        default -> buf.readUnsignedByte();
+                    };
                     int index = BitUtil.to(mask, 6);
                     switch (index) {
-                        case 1:
-                            position.set(Position.PREFIX_TEMP + 1, value);
-                            break;
-                        case 2:
-                            position.set("humidity", value);
-                            break;
-                        case 3:
-                            position.set("illumination", value);
-                            break;
-                        case 4:
-                            position.set(Position.KEY_BATTERY, value);
-                            break;
-                        default:
-                            position.set("can" + index, value);
-                            break;
+                        case 1 -> position.set(Position.PREFIX_TEMP + 1, value);
+                        case 2 -> position.set("humidity", value);
+                        case 3 -> position.set("illumination", value);
+                        case 4 -> position.set(Position.KEY_BATTERY, value);
+                        default -> position.set("can" + index, value);
                     }
                 }
             }
diff --git a/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java b/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java
index c02fa4112..9bd0e7909 100644
--- a/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java
@@ -29,16 +29,11 @@ public class AdmProtocolEncoder extends StringProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_GET_DEVICE_STATUS:
-                return formatCommand(command, "STATUS\r\n");
-
-            case Command.TYPE_CUSTOM:
-                return formatCommand(command, "%s\r\n", Command.KEY_DATA);
-
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_GET_DEVICE_STATUS -> formatCommand(command, "STATUS\r\n");
+            case Command.TYPE_CUSTOM -> formatCommand(command, "%s\r\n", Command.KEY_DATA);
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java b/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java
index 0cd8ca37e..d560620b7 100644
--- a/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java
@@ -88,40 +88,19 @@ public class AplicomProtocolDecoder extends BaseProtocolDecoder {
 
     private void decodeEventData(Position position, ByteBuf buf, int event) {
         switch (event) {
-            case 2:
-            case 40:
-                buf.readUnsignedByte();
-                break;
-            case 9:
-                buf.readUnsignedMedium();
-                break;
-            case 31:
-            case 32:
-                buf.readUnsignedShort();
-                break;
-            case 38:
-                buf.skipBytes(4 * 9);
-                break;
-            case 113:
+            case 2, 40 -> buf.readUnsignedByte();
+            case 9 -> buf.readUnsignedMedium();
+            case 31, 32 -> buf.readUnsignedShort();
+            case 38 -> buf.skipBytes(4 * 9);
+            case 113 -> {
                 buf.readUnsignedInt();
                 buf.readUnsignedByte();
-                break;
-            case 119:
-                position.set("eventData", ByteBufUtil.hexDump(
-                        buf, buf.readerIndex(), Math.min(buf.readableBytes(), 1024)));
-                break;
-            case 121:
-            case 142:
-                buf.readLong();
-                break;
-            case 130:
-                buf.readUnsignedInt(); // incorrect
-                break;
-            case 188:
-                decodeEB(position, buf);
-                break;
-            default:
-                break;
+            }
+            case 119 -> position.set("eventData", ByteBufUtil.hexDump(
+                    buf, buf.readerIndex(), Math.min(buf.readableBytes(), 1024)));
+            case 121, 142 -> buf.readLong();
+            case 130 -> buf.readUnsignedInt(); // incorrect
+            case 188 -> decodeEB(position, buf);
         }
     }
 
@@ -145,62 +124,42 @@ public class AplicomProtocolDecoder extends BaseProtocolDecoder {
         for (int i = 0; i < count; i++) {
             ByteBuf value = values.get(i);
             switch (buf.readInt()) {
-                case 0x20D:
+                case 0x20D -> {
                     position.set(Position.KEY_RPM, value.readShortLE());
                     position.set("dieselTemperature", value.readShortLE() * 0.1);
                     position.set("batteryVoltage", value.readShortLE() * 0.01);
                     position.set("supplyAirTempDep1", value.readShortLE() * 0.1);
-                    break;
-                case 0x30D:
-                    position.set("activeAlarm", ByteBufUtil.hexDump(value));
-                    break;
-                case 0x40C:
+                }
+                case 0x30D -> position.set("activeAlarm", ByteBufUtil.hexDump(value));
+                case 0x40C -> {
                     position.set("airTempDep1", value.readShortLE() * 0.1);
                     position.set("airTempDep2", value.readShortLE() * 0.1);
-                    break;
-                case 0x40D:
-                    position.set("coldUnitState", ByteBufUtil.hexDump(value));
-                    break;
-                case 0x50C:
+                }
+                case 0x40D -> position.set("coldUnitState", ByteBufUtil.hexDump(value));
+                case 0x50C -> {
                     position.set("defrostTempDep1", value.readShortLE() * 0.1);
                     position.set("defrostTempDep2", value.readShortLE() * 0.1);
-                    break;
-                case 0x50D:
+                }
+                case 0x50D -> {
                     position.set("condenserPressure", value.readShortLE() * 0.1);
                     position.set("suctionPressure", value.readShortLE() * 0.1);
-                    break;
-                case 0x58C:
+                }
+                case 0x58C -> {
                     value.readByte();
                     value.readShort(); // index
                     switch (value.readByte()) {
-                        case 0x01:
-                            position.set("setpointZone1", value.readIntLE() * 0.1);
-                            break;
-                        case 0x02:
-                            position.set("setpointZone2", value.readIntLE() * 0.1);
-                            break;
-                        case 0x05:
-                            position.set("unitType", value.readIntLE());
-                            break;
-                        case 0x13:
-                            position.set("dieselHours", value.readIntLE() / 60 / 60);
-                            break;
-                        case 0x14:
-                            position.set("electricHours", value.readIntLE() / 60 / 60);
-                            break;
-                        case 0x17:
-                            position.set("serviceIndicator", value.readIntLE());
-                            break;
-                        case 0x18:
-                            position.set("softwareVersion", value.readIntLE() * 0.01);
-                            break;
-                        default:
-                            break;
+                        case 0x01 -> position.set("setpointZone1", value.readIntLE() * 0.1);
+                        case 0x02 -> position.set("setpointZone2", value.readIntLE() * 0.1);
+                        case 0x05 -> position.set("unitType", value.readIntLE());
+                        case 0x13 -> position.set("dieselHours", value.readIntLE() / 60 / 60);
+                        case 0x14 -> position.set("electricHours", value.readIntLE() / 60 / 60);
+                        case 0x17 -> position.set("serviceIndicator", value.readIntLE());
+                        case 0x18 -> position.set("softwareVersion", value.readIntLE() * 0.01);
+                        default -> {
+                        }
                     }
-                    break;
-                default:
-                    LOGGER.warn("Aplicom CAN decoding error", new UnsupportedOperationException());
-                    break;
+                }
+                default -> LOGGER.warn("Aplicom CAN decoding error", new UnsupportedOperationException());
             }
         }
     }
@@ -487,50 +446,39 @@ public class AplicomProtocolDecoder extends BaseProtocolDecoder {
             int end = buf.readerIndex() + length;
 
             switch (type) {
-                case 0x01:
-                    position.set("brakeFlags", ByteBufUtil.hexDump(buf.readSlice(length)));
-                    break;
-                case 0x02:
+                case 0x01 -> position.set("brakeFlags", ByteBufUtil.hexDump(buf.readSlice(length)));
+                case 0x02 -> {
                     position.set("wheelSpeed", buf.readUnsignedShort() / 256.0);
                     position.set("wheelSpeedDifference", buf.readUnsignedShort() / 256.0 - 125.0);
                     position.set("lateralAcceleration", buf.readUnsignedByte() / 10.0 - 12.5);
                     position.set("vehicleSpeed", buf.readUnsignedShort() / 256.0);
-                    break;
-                case 0x03:
-                    position.set(Position.KEY_AXLE_WEIGHT, buf.readUnsignedShort() * 2);
-                    break;
-                case 0x04:
+                }
+                case 0x03 -> position.set(Position.KEY_AXLE_WEIGHT, buf.readUnsignedShort() * 2);
+                case 0x04 -> {
                     position.set("tirePressure", buf.readUnsignedByte() * 10);
                     position.set("pneumaticPressure", buf.readUnsignedByte() * 5);
-                    break;
-                case 0x05:
+                }
+                case 0x05 -> {
                     position.set("brakeLining", buf.readUnsignedByte() * 0.4);
                     position.set("brakeTemperature", buf.readUnsignedByte() * 10);
-                    break;
-                case 0x06:
+                }
+                case 0x06 -> {
                     position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 5L);
                     position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt() * 5L);
                     position.set(Position.KEY_ODOMETER_SERVICE, (buf.readUnsignedInt() - 2105540607) * 5L);
-                    break;
-                case 0x0A:
+                }
+                case 0x0A -> {
                     position.set("absStatusCounter", buf.readUnsignedShort());
                     position.set("atvbStatusCounter", buf.readUnsignedShort());
                     position.set("vdcActiveCounter", buf.readUnsignedShort());
-                    break;
-                case 0x0B:
-                    position.set("brakeMinMaxData", ByteBufUtil.hexDump(buf.readSlice(length)));
-                    break;
-                case 0x0C:
-                    position.set("missingPgn", ByteBufUtil.hexDump(buf.readSlice(length)));
-                    break;
-                case 0x0D:
+                }
+                case 0x0B -> position.set("brakeMinMaxData", ByteBufUtil.hexDump(buf.readSlice(length)));
+                case 0x0C -> position.set("missingPgn", ByteBufUtil.hexDump(buf.readSlice(length)));
+                case 0x0D -> {
                     buf.readUnsignedByte();
                     position.set("towedDetectionStatus", buf.readUnsignedInt());
                     buf.skipBytes(17); // vin
-                    break;
-                case 0x0E:
-                default:
-                    break;
+                }
             }
 
             buf.readerIndex(end);
diff --git a/src/main/java/org/traccar/protocol/ArknavX8ProtocolDecoder.java b/src/main/java/org/traccar/protocol/ArknavX8ProtocolDecoder.java
index 22c0344d6..ac32abb93 100644
--- a/src/main/java/org/traccar/protocol/ArknavX8ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/ArknavX8ProtocolDecoder.java
@@ -67,16 +67,11 @@ public class ArknavX8ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        switch (sentence.substring(0, 2)) {
-            case "1G":
-            case "1R":
-            case "1M":
-                return decode1G(channel, remoteAddress, sentence);
-            case "2G":
-                return decode2G(channel, remoteAddress, sentence);
-            default:
-                return null;
-        }
+        return switch (sentence.substring(0, 2)) {
+            case "1G", "1R", "1M" -> decode1G(channel, remoteAddress, sentence);
+            case "2G" -> decode2G(channel, remoteAddress, sentence);
+            default -> null;
+        };
     }
 
     private Position decode1G(Channel channel, SocketAddress remoteAddress, String sentence) {
diff --git a/src/main/java/org/traccar/protocol/ArnaviBinaryProtocolDecoder.java b/src/main/java/org/traccar/protocol/ArnaviBinaryProtocolDecoder.java
index 0f6b7a33f..7735d8ff4 100644
--- a/src/main/java/org/traccar/protocol/ArnaviBinaryProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/ArnaviBinaryProtocolDecoder.java
@@ -147,11 +147,7 @@ public class ArnaviBinaryProtocolDecoder extends BaseProtocolDecoder {
         byte recordType = buf.readByte();
         while (buf.readableBytes() > 0) {
             switch (recordType) {
-                case RECORD_PING:
-                case RECORD_DATA:
-                case RECORD_TEXT:
-                case RECORD_FILE:
-                case RECORD_BINARY:
+                case RECORD_PING, RECORD_DATA, RECORD_TEXT, RECORD_FILE, RECORD_BINARY -> {
                     int length = buf.readUnsignedShortLE();
                     Date time = new Date(buf.readUnsignedIntLE() * 1000);
 
@@ -162,10 +158,10 @@ public class ArnaviBinaryProtocolDecoder extends BaseProtocolDecoder {
                     }
 
                     buf.readUnsignedByte(); // checksum
-                    break;
-
-                default:
+                }
+                default -> {
                     return null;
+                }
             }
 
             recordType = buf.readByte();
diff --git a/src/main/java/org/traccar/protocol/AtrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/AtrackProtocolDecoder.java
index 834f4f16c..0ef977e53 100644
--- a/src/main/java/org/traccar/protocol/AtrackProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/AtrackProtocolDecoder.java
@@ -127,7 +127,7 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
                 position.set("tag" + i + "Id", ByteBufUtil.hexDump(data.readSlice(6)));
             }
             switch (mode) {
-                case 1:
+                case 1 -> {
                     if (BitUtil.check(mask, 6)) {
                         data.readUnsignedShort(); // major
                     }
@@ -140,8 +140,8 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
                     if (BitUtil.check(mask, 3)) {
                         position.set("tag" + i + "Rssi", data.readUnsignedByte());
                     }
-                    break;
-                case 2:
+                }
+                case 2 -> {
                     if (BitUtil.check(mask, 6)) {
                         data.readUnsignedShort(); // battery voltage
                     }
@@ -154,8 +154,8 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
                     if (BitUtil.check(mask, 3)) {
                         position.set("tag" + i + "Rssi", data.readUnsignedByte());
                     }
-                    break;
-                case 3:
+                }
+                case 3 -> {
                     if (BitUtil.check(mask, 6)) {
                         position.set("tag" + i + "Humidity", data.readUnsignedShort());
                     }
@@ -168,36 +168,23 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
                     if (BitUtil.check(mask, 2)) {
                         data.readUnsignedShort();
                     }
-                    break;
-                case 4:
+                }
+                case 4 -> {
                     if (BitUtil.check(mask, 6)) {
                         int hardwareId = data.readUnsignedByte();
                         if (BitUtil.check(mask, 5)) {
                             switch (hardwareId) {
-                                case 1:
-                                case 4:
-                                    data.skipBytes(11); // fuel
-                                    break;
-                                case 2:
-                                    data.skipBytes(2); // temperature
-                                    break;
-                                case 3:
-                                    data.skipBytes(6); // temperature and luminosity
-                                    break;
-                                case 5:
-                                    data.skipBytes(10); // temperature, humidity, luminosity and pressure
-                                    break;
-                                default:
-                                    break;
+                                case 1, 4 -> data.skipBytes(11); // fuel
+                                case 2 -> data.skipBytes(2); // temperature
+                                case 3 -> data.skipBytes(6); // temperature and luminosity
+                                case 5 -> data.skipBytes(10); // temperature, humidity, luminosity and pressure
                             }
                         }
                     }
                     if (BitUtil.check(mask, 4)) {
                         data.skipBytes(9); // name
                     }
-                    break;
-                default:
-                    break;
+                }
             }
             i += 1;
         }
@@ -209,101 +196,58 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
         String[] values = data.split(",|\r\n");
         for (int i = 0; i < Math.min(keys.length, values.length); i++) {
             switch (keys[i]) {
-                case "SA":
-                    position.set(Position.KEY_SATELLITES, Integer.parseInt(values[i]));
-                    break;
-                case "MV":
-                    position.set(Position.KEY_POWER, Integer.parseInt(values[i]) * 0.1);
-                    break;
-                case "BV":
-                    position.set(Position.KEY_BATTERY, Integer.parseInt(values[i]) * 0.1);
-                    break;
-                case "GQ":
-                    cellTower.setSignalStrength(Integer.parseInt(values[i]));
-                    break;
-                case "CE":
-                    cellTower.setCellId(Long.parseLong(values[i]));
-                    break;
-                case "LC":
-                    cellTower.setLocationAreaCode(Integer.parseInt(values[i]));
-                    break;
-                case "CN":
+                case "SA" -> position.set(Position.KEY_SATELLITES, Integer.parseInt(values[i]));
+                case "MV" -> position.set(Position.KEY_POWER, Integer.parseInt(values[i]) * 0.1);
+                case "BV" -> position.set(Position.KEY_BATTERY, Integer.parseInt(values[i]) * 0.1);
+                case "GQ" -> cellTower.setSignalStrength(Integer.parseInt(values[i]));
+                case "CE" -> cellTower.setCellId(Long.parseLong(values[i]));
+                case "LC" -> cellTower.setLocationAreaCode(Integer.parseInt(values[i]));
+                case "CN" -> {
                     if (values[i].length() > 3) {
                         cellTower.setMobileCountryCode(Integer.parseInt(values[i].substring(0, 3)));
                         cellTower.setMobileNetworkCode(Integer.parseInt(values[i].substring(3)));
                     }
-                    break;
-                case "PC":
-                    position.set(Position.PREFIX_COUNT + 1, Integer.parseInt(values[i]));
-                    break;
-                case "AT":
-                    position.setAltitude(Integer.parseInt(values[i]));
-                    break;
-                case "RP":
-                    position.set(Position.KEY_RPM, Integer.parseInt(values[i]));
-                    break;
-                case "GS":
-                    position.set(Position.KEY_RSSI, Integer.parseInt(values[i]));
-                    break;
-                case "DT":
-                    position.set(Position.KEY_ARCHIVE, Integer.parseInt(values[i]) == 1);
-                    break;
-                case "VN":
-                    position.set(Position.KEY_VIN, values[i]);
-                    break;
-                case "TR":
-                    position.set(Position.KEY_THROTTLE, Integer.parseInt(values[i]));
-                    break;
-                case "ET":
-                    position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(values[i]));
-                    break;
-                case "FL":
-                    position.set(Position.KEY_FUEL_LEVEL, Integer.parseInt(values[i]));
-                    break;
-                case "FC":
-                    position.set(Position.KEY_FUEL_CONSUMPTION, Integer.parseInt(values[i]));
-                    break;
-                case "AV1":
-                    position.set(Position.PREFIX_ADC + 1, Integer.parseInt(values[i]));
-                    break;
-                case "CD":
-                    position.set(Position.KEY_ICCID, values[i]);
-                    break;
-                case "EH":
-                    position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(Integer.parseInt(values[i]) * 0.1));
-                    break;
-                case "IA":
-                    position.set("intakeTemp", Integer.parseInt(values[i]));
-                    break;
-                case "EL":
-                    position.set(Position.KEY_ENGINE_LOAD, Integer.parseInt(values[i]));
-                    break;
-                case "HA":
+                }
+                case "PC" -> position.set(Position.PREFIX_COUNT + 1, Integer.parseInt(values[i]));
+                case "AT" -> position.setAltitude(Integer.parseInt(values[i]));
+                case "RP" -> position.set(Position.KEY_RPM, Integer.parseInt(values[i]));
+                case "GS" -> position.set(Position.KEY_RSSI, Integer.parseInt(values[i]));
+                case "DT" -> position.set(Position.KEY_ARCHIVE, Integer.parseInt(values[i]) == 1);
+                case "VN" -> position.set(Position.KEY_VIN, values[i]);
+                case "TR" -> position.set(Position.KEY_THROTTLE, Integer.parseInt(values[i]));
+                case "ET" -> position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(values[i]));
+                case "FL" -> position.set(Position.KEY_FUEL_LEVEL, Integer.parseInt(values[i]));
+                case "FC" -> position.set(Position.KEY_FUEL_CONSUMPTION, Integer.parseInt(values[i]));
+                case "AV1" -> position.set(Position.PREFIX_ADC + 1, Integer.parseInt(values[i]));
+                case "CD" -> position.set(Position.KEY_ICCID, values[i]);
+                case "EH" ->
+                        position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(Integer.parseInt(values[i]) * 0.1));
+                case "IA" -> position.set("intakeTemp", Integer.parseInt(values[i]));
+                case "EL" -> position.set(Position.KEY_ENGINE_LOAD, Integer.parseInt(values[i]));
+                case "HA" -> {
                     if (Integer.parseInt(values[i]) > 0) {
                         position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
                     }
-                    break;
-                case "HB":
+                }
+                case "HB" -> {
                     if (Integer.parseInt(values[i]) > 0) {
                         position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
                     }
-                    break;
-                case "HC":
+                }
+                case "HC" -> {
                     if (Integer.parseInt(values[i]) > 0) {
                         position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
                     }
-                    break;
-                case "MT":
-                    position.set(Position.KEY_MOTION, Integer.parseInt(values[i]) > 0);
-                    break;
-                case "BC":
+                }
+                case "MT" -> position.set(Position.KEY_MOTION, Integer.parseInt(values[i]) > 0);
+                case "BC" -> {
                     String[] beaconValues = values[i].split(":");
                     decodeBeaconData(
                             position, Integer.parseInt(beaconValues[0]), Integer.parseInt(beaconValues[1]),
                             Unpooled.wrappedBuffer(DataConverter.parseHex(beaconValues[2])));
-                    break;
-                default:
-                    break;
+                }
+                default -> {
+                }
             }
         }
 
@@ -322,320 +266,122 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
         String[] keys = form.substring(1).split("%");
         for (String key : keys) {
             switch (key) {
-                case "SA":
-                    position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
-                    break;
-                case "MT":
-                    position.set(Position.KEY_MOTION, buf.readUnsignedByte() > 0);
-                    break;
-                case "MV":
-                    position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.1);
-                    break;
-                case "BV":
-                    position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.1);
-                    break;
-                case "GQ":
-                    cellTower.setSignalStrength((int) buf.readUnsignedByte());
-                    break;
-                case "CE":
-                    cellTower.setCellId(buf.readUnsignedInt());
-                    break;
-                case "LC":
-                    cellTower.setLocationAreaCode(buf.readUnsignedShort());
-                    break;
-                case "CN":
+                case "SA" -> position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                case "MT" -> position.set(Position.KEY_MOTION, buf.readUnsignedByte() > 0);
+                case "MV" -> position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.1);
+                case "BV" -> position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.1);
+                case "GQ" -> cellTower.setSignalStrength((int) buf.readUnsignedByte());
+                case "CE" -> cellTower.setCellId(buf.readUnsignedInt());
+                case "LC" -> cellTower.setLocationAreaCode(buf.readUnsignedShort());
+                case "CN" -> {
                     int combinedMobileCodes = (int) (buf.readUnsignedInt() % 100000); // cccnn
                     cellTower.setMobileCountryCode(combinedMobileCodes / 100);
                     cellTower.setMobileNetworkCode(combinedMobileCodes % 100);
-                    break;
-                case "RL":
-                    buf.readUnsignedByte(); // rxlev
-                    break;
-                case "PC":
-                    position.set(Position.PREFIX_COUNT + 1, buf.readUnsignedInt());
-                    break;
-                case "AT":
-                    position.setAltitude(buf.readUnsignedInt());
-                    break;
-                case "RP":
-                    position.set(Position.KEY_RPM, buf.readUnsignedShort());
-                    break;
-                case "GS":
-                    position.set(Position.KEY_RSSI, buf.readUnsignedByte());
-                    break;
-                case "DT":
-                    position.set(Position.KEY_ARCHIVE, buf.readUnsignedByte() == 1);
-                    break;
-                case "VN":
-                    position.set(Position.KEY_VIN, readString(buf));
-                    break;
-                case "MF":
-                    buf.readUnsignedShort(); // mass air flow rate
-                    break;
-                case "EL":
-                    buf.readUnsignedByte(); // engine load
-                    break;
-                case "TR":
-                    position.set(Position.KEY_THROTTLE, buf.readUnsignedByte());
-                    break;
-                case "ET":
-                    position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedShort());
-                    break;
-                case "FL":
-                    position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
-                    break;
-                case "ML":
-                    buf.readUnsignedByte(); // mil status
-                    break;
-                case "FC":
-                    position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedInt());
-                    break;
-                case "CI":
-                    readString(buf); // format string
-                    break;
-                case "AV1":
-                    position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
-                    break;
-                case "NC":
-                    readString(buf); // gsm neighbor cell info
-                    break;
-                case "SM":
-                    buf.readUnsignedShort(); // max speed between reports
-                    break;
-                case "GL":
-                    readString(buf); // google link
-                    break;
-                case "MA":
-                    readString(buf); // mac address
-                    break;
-                case "PD":
-                    buf.readUnsignedByte(); // pending code status
-                    break;
-                case "CD":
-                    position.set(Position.KEY_ICCID, readString(buf));
-                    break;
-                case "CM":
-                    buf.readLong(); // imsi
-                    break;
-                case "GN":
-                    buf.skipBytes(60); // g sensor data
-                    break;
-                case "GV":
-                    buf.skipBytes(6); // maximum g force
-                    break;
-                case "ME":
-                    buf.readLong(); // imei
-                    break;
-                case "IA":
-                    buf.readUnsignedByte(); // intake air temperature
-                    break;
-                case "MP":
-                    buf.readUnsignedByte(); // manifold absolute pressure
-                    break;
-                case "EO":
-                    position.set(Position.KEY_ODOMETER, UnitsConverter.metersFromMiles(buf.readUnsignedInt()));
-                    break;
-                case "EH":
-                    position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 360000);
-                    break;
-                case "ZO1":
-                    buf.readUnsignedByte(); // brake stroke status
-                    break;
-                case "ZO2":
-                    buf.readUnsignedByte(); // warning indicator status
-                    break;
-                case "ZO3":
-                    buf.readUnsignedByte(); // abs control status
-                    break;
-                case "ZO4":
-                    position.set(Position.KEY_THROTTLE, buf.readUnsignedByte() * 0.4);
-                    break;
-                case "ZO5":
-                    buf.readUnsignedByte(); // parking brake status
-                    break;
-                case "ZO6":
-                    position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte() * 0.805);
-                    break;
-                case "ZO7":
-                    buf.readUnsignedByte(); // cruise control status
-                    break;
-                case "ZO8":
-                    buf.readUnsignedByte(); // accelector pedal position
-                    break;
-                case "ZO9":
-                    position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedByte() * 0.5);
-                    break;
-                case "ZO10":
-                    position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.5);
-                    break;
-                case "ZO11":
-                    buf.readUnsignedByte(); // engine oil pressure
-                    break;
-                case "ZO12":
-                    buf.readUnsignedByte(); // boost pressure
-                    break;
-                case "ZO13":
-                    buf.readUnsignedByte(); // intake temperature
-                    break;
-                case "ZO14":
-                    position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedByte());
-                    break;
-                case "ZO15":
-                    buf.readUnsignedByte(); // brake application pressure
-                    break;
-                case "ZO16":
-                    buf.readUnsignedByte(); // brake primary pressure
-                    break;
-                case "ZO17":
-                    buf.readUnsignedByte(); // brake secondary pressure
-                    break;
-                case "ZH1":
-                    buf.readUnsignedShort(); // cargo weight
-                    break;
-                case "ZH2":
-                    position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort() * 16.428 / 3600);
-                    break;
-                case "ZH3":
-                    position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.25);
-                    break;
-                case "ZL1":
-                    buf.readUnsignedInt(); // fuel used (natural gas)
-                    break;
-                case "ZL2":
-                    position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 161);
-                    break;
-                case "ZL3":
-                    buf.readUnsignedInt(); // vehicle hours
-                    break;
-                case "ZL4":
-                    position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 5 * 36000);
-                    break;
-                case "ZS1":
-                    position.set(Position.KEY_VIN, readString(buf));
-                    break;
-                case "JO1":
-                    buf.readUnsignedByte(); // pedals
-                    break;
-                case "JO2":
-                    buf.readUnsignedByte(); // power takeoff device
-                    break;
-                case "JO3":
-                    buf.readUnsignedByte(); // accelector pedal position
-                    break;
-                case "JO4":
-                    position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedByte());
-                    break;
-                case "JO5":
-                    position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4);
-                    break;
-                case "JO6":
-                    buf.readUnsignedByte(); // fms vehicle interface
-                    break;
-                case "JO7":
-                    buf.readUnsignedByte(); // driver 2
-                    break;
-                case "JO8":
-                    buf.readUnsignedByte(); // driver 1
-                    break;
-                case "JO9":
-                    buf.readUnsignedByte(); // drivers
-                    break;
-                case "JO10":
-                    buf.readUnsignedByte(); // system information
-                    break;
-                case "JO11":
-                    position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedByte() - 40);
-                    break;
-                case "JO12":
-                    buf.readUnsignedByte(); // pto engaged
-                    break;
-                case "JH1":
-                    position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() / 256.0);
-                    break;
-                case "JH2":
-                    position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.125);
-                    break;
-                case "JH3":
-                case "JH4":
-                case "JH5":
-                case "JH6":
-                case "JH7":
+                }
+                case "RL" -> buf.readUnsignedByte(); // rxlev
+                case "PC" -> position.set(Position.PREFIX_COUNT + 1, buf.readUnsignedInt());
+                case "AT" -> position.setAltitude(buf.readUnsignedInt());
+                case "RP" -> position.set(Position.KEY_RPM, buf.readUnsignedShort());
+                case "GS" -> position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                case "DT" -> position.set(Position.KEY_ARCHIVE, buf.readUnsignedByte() == 1);
+                case "VN" -> position.set(Position.KEY_VIN, readString(buf));
+                case "MF" -> buf.readUnsignedShort(); // mass air flow rate
+                case "EL" -> buf.readUnsignedByte(); // engine load
+                case "TR" -> position.set(Position.KEY_THROTTLE, buf.readUnsignedByte());
+                case "ET" -> position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedShort());
+                case "FL" -> position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
+                case "ML" -> buf.readUnsignedByte(); // mil status
+                case "FC" -> position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedInt());
+                case "CI" -> readString(buf); // format string
+                case "AV1" -> position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
+                case "NC" -> readString(buf); // gsm neighbor cell info
+                case "SM" -> buf.readUnsignedShort(); // max speed between reports
+                case "GL" -> readString(buf); // google link
+                case "MA" -> readString(buf); // mac address
+                case "PD" -> buf.readUnsignedByte(); // pending code status
+                case "CD" -> position.set(Position.KEY_ICCID, readString(buf));
+                case "CM" -> buf.readLong(); // imsi
+                case "GN" -> buf.skipBytes(60); // g sensor data
+                case "GV" -> buf.skipBytes(6); // maximum g force
+                case "ME" -> buf.readLong(); // imei
+                case "IA" -> buf.readUnsignedByte(); // intake air temperature
+                case "MP" -> buf.readUnsignedByte(); // manifold absolute pressure
+                case "EO" -> position.set(Position.KEY_ODOMETER, UnitsConverter.metersFromMiles(buf.readUnsignedInt()));
+                case "EH" -> position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 360000);
+                case "ZO1" -> buf.readUnsignedByte(); // brake stroke status
+                case "ZO2" -> buf.readUnsignedByte(); // warning indicator status
+                case "ZO3" -> buf.readUnsignedByte(); // abs control status
+                case "ZO4" -> position.set(Position.KEY_THROTTLE, buf.readUnsignedByte() * 0.4);
+                case "ZO5" -> buf.readUnsignedByte(); // parking brake status
+                case "ZO6" -> position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte() * 0.805);
+                case "ZO7" -> buf.readUnsignedByte(); // cruise control status
+                case "ZO8" -> buf.readUnsignedByte(); // accelector pedal position
+                case "ZO9" -> position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedByte() * 0.5);
+                case "ZO10" -> position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.5);
+                case "ZO11" -> buf.readUnsignedByte(); // engine oil pressure
+                case "ZO12" -> buf.readUnsignedByte(); // boost pressure
+                case "ZO13" -> buf.readUnsignedByte(); // intake temperature
+                case "ZO14" -> position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedByte());
+                case "ZO15" -> buf.readUnsignedByte(); // brake application pressure
+                case "ZO16" -> buf.readUnsignedByte(); // brake primary pressure
+                case "ZO17" -> buf.readUnsignedByte(); // brake secondary pressure
+                case "ZH1" -> buf.readUnsignedShort(); // cargo weight
+                case "ZH2" -> position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort() * 16.428 / 3600);
+                case "ZH3" -> position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.25);
+                case "ZL1" -> buf.readUnsignedInt(); // fuel used (natural gas)
+                case "ZL2" -> position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 161);
+                case "ZL3" -> buf.readUnsignedInt(); // vehicle hours
+                case "ZL4" -> position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 5 * 36000);
+                case "ZS1" -> position.set(Position.KEY_VIN, readString(buf));
+                case "JO1" -> buf.readUnsignedByte(); // pedals
+                case "JO2" -> buf.readUnsignedByte(); // power takeoff device
+                case "JO3" -> buf.readUnsignedByte(); // accelector pedal position
+                case "JO4" -> position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedByte());
+                case "JO5" -> position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4);
+                case "JO6" -> buf.readUnsignedByte(); // fms vehicle interface
+                case "JO7" -> buf.readUnsignedByte(); // driver 2
+                case "JO8" -> buf.readUnsignedByte(); // driver 1
+                case "JO9" -> buf.readUnsignedByte(); // drivers
+                case "JO10" -> buf.readUnsignedByte(); // system information
+                case "JO11" -> position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedByte() - 40);
+                case "JO12" -> buf.readUnsignedByte(); // pto engaged
+                case "JH1" -> position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() / 256.0);
+                case "JH2" -> position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.125);
+                case "JH3", "JH4", "JH5", "JH6", "JH7" -> {
                     int index = Integer.parseInt(key.substring(2)) - 2;
                     position.set("axleWeight" + index, buf.readUnsignedShort() * 0.5);
-                    break;
-                case "JH8":
-                    position.set(Position.KEY_ODOMETER_SERVICE, buf.readUnsignedShort() * 5);
-                    break;
-                case "JH9":
-                    buf.readUnsignedShort(); // tachograph speed
-                    break;
-                case "JH10":
-                    buf.readUnsignedShort(); // ambient air temperature
-                    break;
-                case "JH11":
-                    position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort() * 0.05);
-                    break;
-                case "JH12":
-                    buf.readUnsignedShort(); // fuel economy
-                    break;
-                case "JL1":
-                    position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.5);
-                    break;
-                case "JL2":
-                    position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 5 * 36000);
-                    break;
-                case "JL3":
-                    position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 1000);
-                    break;
-                case "JL4":
-                    position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.001);
-                    break;
-                case "JS1":
-                    position.set(Position.KEY_VIN, readString(buf));
-                    break;
-                case "JS2":
-                    readString(buf); // fms version supported
-                    break;
-                case "JS3":
-                    position.set("driver1", readString(buf));
-                    break;
-                case "JS4":
-                    position.set("driver2", readString(buf));
-                    break;
-                case "JN1":
-                    buf.readUnsignedInt(); // cruise control distance
-                    break;
-                case "JN2":
-                    buf.readUnsignedInt(); // excessive idling time
-                    break;
-                case "JN3":
-                    buf.readUnsignedInt(); // excessive idling fuel
-                    break;
-                case "JN4":
-                    buf.readUnsignedInt(); // pto time
-                    break;
-                case "JN5":
-                    buf.readUnsignedInt(); // pto fuel
-                    break;
-                case "IN0":
-                    position.set(Position.KEY_IGNITION, buf.readUnsignedByte() > 0);
-                    break;
-                case "IN1":
-                case "IN2":
-                case "IN3":
+                }
+                case "JH8" -> position.set(Position.KEY_ODOMETER_SERVICE, buf.readUnsignedShort() * 5);
+                case "JH9" -> buf.readUnsignedShort(); // tachograph speed
+                case "JH10" -> buf.readUnsignedShort(); // ambient air temperature
+                case "JH11" -> position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort() * 0.05);
+                case "JH12" -> buf.readUnsignedShort(); // fuel economy
+                case "JL1" -> position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.5);
+                case "JL2" -> position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 5 * 36000);
+                case "JL3" -> position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 1000);
+                case "JL4" -> position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.001);
+                case "JS1" -> position.set(Position.KEY_VIN, readString(buf));
+                case "JS2" -> readString(buf); // fms version supported
+                case "JS3" -> position.set("driver1", readString(buf));
+                case "JS4" -> position.set("driver2", readString(buf));
+                case "JN1" -> buf.readUnsignedInt(); // cruise control distance
+                case "JN2" -> buf.readUnsignedInt(); // excessive idling time
+                case "JN3" -> buf.readUnsignedInt(); // excessive idling fuel
+                case "JN4" -> buf.readUnsignedInt(); // pto time
+                case "JN5" -> buf.readUnsignedInt(); // pto fuel
+                case "IN0" -> position.set(Position.KEY_IGNITION, buf.readUnsignedByte() > 0);
+                case "IN1", "IN2", "IN3" -> {
                     position.set(Position.PREFIX_IN + key.charAt(2), buf.readUnsignedByte() > 0);
-                    break;
-                case "HA":
+                }
+                case "HA" -> {
                     position.set(Position.KEY_ALARM, buf.readUnsignedByte() > 0 ? Position.ALARM_ACCELERATION : null);
-                    break;
-                case "HB":
+                }
+                case "HB" -> {
                     position.set(Position.KEY_ALARM, buf.readUnsignedByte() > 0 ? Position.ALARM_BRAKING : null);
-                    break;
-                case "HC":
+                }
+                case "HC" -> {
                     position.set(Position.KEY_ALARM, buf.readUnsignedByte() > 0 ? Position.ALARM_CORNERING : null);
-                    break;
-                default:
-                    break;
+                }
             }
         }
 
diff --git a/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java b/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java
index d803ae391..00752dbc6 100644
--- a/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java
@@ -31,13 +31,11 @@ public class AtrackProtocolEncoder extends BaseProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_CUSTOM:
-                return Unpooled.copiedBuffer(
-                        command.getString(Command.KEY_DATA) + "\r\n", StandardCharsets.US_ASCII);
-            default:
-                return null;
+        if (command.getType().equals(Command.TYPE_CUSTOM)) {
+            return Unpooled.copiedBuffer(
+                    command.getString(Command.KEY_DATA) + "\r\n", StandardCharsets.US_ASCII);
         }
+        return null;
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/AutoFonFrameDecoder.java b/src/main/java/org/traccar/protocol/AutoFonFrameDecoder.java
index 69f28133f..f0545279a 100644
--- a/src/main/java/org/traccar/protocol/AutoFonFrameDecoder.java
+++ b/src/main/java/org/traccar/protocol/AutoFonFrameDecoder.java
@@ -32,27 +32,14 @@ public class AutoFonFrameDecoder extends BaseFrameDecoder {
             return null;
         }
 
-        int length;
-        switch (buf.getUnsignedByte(buf.readerIndex())) {
-            case AutoFonProtocolDecoder.MSG_LOGIN:
-                length = 12;
-                break;
-            case AutoFonProtocolDecoder.MSG_LOCATION:
-                length = 78;
-                break;
-            case AutoFonProtocolDecoder.MSG_HISTORY:
-                length = 257;
-                break;
-            case AutoFonProtocolDecoder.MSG_45_LOGIN:
-                length = 19;
-                break;
-            case AutoFonProtocolDecoder.MSG_45_LOCATION:
-                length = 34;
-                break;
-            default:
-                length = 0;
-                break;
-        }
+        int length = switch (buf.getUnsignedByte(buf.readerIndex())) {
+            case AutoFonProtocolDecoder.MSG_LOGIN -> 12;
+            case AutoFonProtocolDecoder.MSG_LOCATION -> 78;
+            case AutoFonProtocolDecoder.MSG_HISTORY -> 257;
+            case AutoFonProtocolDecoder.MSG_45_LOGIN -> 19;
+            case AutoFonProtocolDecoder.MSG_45_LOCATION -> 34;
+            default -> 0;
+        };
 
         // Check length and return buffer
         if (length != 0 && buf.readableBytes() >= length) {
diff --git a/src/main/java/org/traccar/protocol/AutoTrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/AutoTrackProtocolDecoder.java
index 938d170e6..78243b76a 100644
--- a/src/main/java/org/traccar/protocol/AutoTrackProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/AutoTrackProtocolDecoder.java
@@ -103,7 +103,7 @@ public class AutoTrackProtocolDecoder extends BaseProtocolDecoder {
 
         DeviceSession deviceSession;
         switch (type) {
-            case MSG_LOGIN_REQUEST:
+            case MSG_LOGIN_REQUEST -> {
                 String imei = ByteBufUtil.hexDump(buf.readSlice(8));
                 deviceSession = getDeviceSession(channel, remoteAddress, imei);
                 if (deviceSession == null) {
@@ -123,16 +123,17 @@ public class AutoTrackProtocolDecoder extends BaseProtocolDecoder {
                     channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
                 }
                 return null;
-            case MSG_TELEMETRY_1:
-            case MSG_TELEMETRY_2:
-            case MSG_TELEMETRY_3:
+            }
+            case MSG_TELEMETRY_1, MSG_TELEMETRY_2, MSG_TELEMETRY_3 -> {
                 deviceSession = getDeviceSession(channel, remoteAddress);
                 if (deviceSession == null) {
                     return null;
                 }
                 return decodeTelemetry(channel, remoteAddress, deviceSession, buf);
-            default:
+            }
+            default -> {
                 return null;
+            }
         }
     }
 
diff --git a/src/main/java/org/traccar/protocol/B2316ProtocolDecoder.java b/src/main/java/org/traccar/protocol/B2316ProtocolDecoder.java
index b0a5411f7..a0c059898 100644
--- a/src/main/java/org/traccar/protocol/B2316ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/B2316ProtocolDecoder.java
@@ -40,35 +40,24 @@ public class B2316ProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private String decodeAlarm(int value) {
-        switch (value) {
-            case 1:
-                return Position.ALARM_LOW_BATTERY;
-            case 2:
-                return Position.ALARM_SOS;
-            case 3:
-                return Position.ALARM_POWER_OFF;
-            case 4:
-                return Position.ALARM_REMOVING;
-            default:
-                return null;
-        }
+        return switch (value) {
+            case 1 -> Position.ALARM_LOW_BATTERY;
+            case 2 -> Position.ALARM_SOS;
+            case 3 -> Position.ALARM_POWER_OFF;
+            case 4 -> Position.ALARM_REMOVING;
+            default -> null;
+        };
     }
 
     private Integer decodeBattery(int value) {
-        switch (value) {
-            case 0:
-                return 10;
-            case 1:
-                return 30;
-            case 2:
-                return 60;
-            case 3:
-                return 80;
-            case 4:
-                return 100;
-            default:
-                return null;
-        }
+        return switch (value) {
+            case 0 -> 10;
+            case 1 -> 30;
+            case 2 -> 60;
+            case 3 -> 80;
+            case 4 -> 100;
+            default -> null;
+        };
     }
 
     @Override
diff --git a/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java b/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java
index db59c564d..c3fbddbeb 100644
--- a/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java
@@ -67,16 +67,12 @@ public class BlueProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private String decodeAlarm(int value) {
-        switch (value) {
-            case 1:
-                return Position.ALARM_SOS;
-            case 8:
-                return Position.ALARM_OVERSPEED;
-            case 19:
-                return Position.ALARM_LOW_POWER;
-            default:
-                return null;
-        }
+        return switch (value) {
+            case 1 -> Position.ALARM_SOS;
+            case 8 -> Position.ALARM_OVERSPEED;
+            case 19 -> Position.ALARM_LOW_POWER;
+            default -> null;
+        };
     }
 
     @Override
diff --git a/src/main/java/org/traccar/protocol/BstplProtocolDecoder.java b/src/main/java/org/traccar/protocol/BstplProtocolDecoder.java
index 15c114642..5dee16cba 100644
--- a/src/main/java/org/traccar/protocol/BstplProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/BstplProtocolDecoder.java
@@ -61,20 +61,14 @@ public class BstplProtocolDecoder extends BaseProtocolDecoder {
             .compile();
 
     private String decodeAlarm(int value) {
-        switch (value) {
-            case 4:
-                return Position.ALARM_LOW_BATTERY;
-            case 5:
-                return Position.ALARM_ACCELERATION;
-            case 6:
-                return Position.ALARM_BRAKING;
-            case 7:
-                return Position.ALARM_OVERSPEED;
-            case 9:
-                return Position.ALARM_SOS;
-            default:
-                return null;
-        }
+        return switch (value) {
+            case 4 -> Position.ALARM_LOW_BATTERY;
+            case 5 -> Position.ALARM_ACCELERATION;
+            case 6 -> Position.ALARM_BRAKING;
+            case 7 -> Position.ALARM_OVERSPEED;
+            case 9 -> Position.ALARM_SOS;
+            default -> null;
+        };
     }
     @Override
     protected Object decode(
diff --git a/src/main/java/org/traccar/protocol/C2stekProtocolDecoder.java b/src/main/java/org/traccar/protocol/C2stekProtocolDecoder.java
index aef158fc7..908f5d0f3 100644
--- a/src/main/java/org/traccar/protocol/C2stekProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/C2stekProtocolDecoder.java
@@ -60,24 +60,16 @@ public class C2stekProtocolDecoder extends BaseProtocolDecoder {
             .compile();
 
     private String decodeAlarm(int alarm) {
-        switch (alarm) {
-            case 0x2:
-                return Position.ALARM_VIBRATION;
-            case 0x3:
-                return Position.ALARM_POWER_CUT;
-            case 0x4:
-                return Position.ALARM_OVERSPEED;
-            case 0x5:
-                return Position.ALARM_SOS;
-            case 0x6:
-                return Position.ALARM_DOOR;
-            case 0xA:
-                return Position.ALARM_LOW_BATTERY;
-            case 0xB:
-                return Position.ALARM_FAULT;
-            default:
-                return null;
-        }
+        return switch (alarm) {
+            case 0x2 -> Position.ALARM_VIBRATION;
+            case 0x3 -> Position.ALARM_POWER_CUT;
+            case 0x4 -> Position.ALARM_OVERSPEED;
+            case 0x5 -> Position.ALARM_SOS;
+            case 0x6 -> Position.ALARM_DOOR;
+            case 0xA -> Position.ALARM_LOW_BATTERY;
+            case 0xB -> Position.ALARM_FAULT;
+            default -> null;
+        };
     }
 
     @Override
diff --git a/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java b/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java
index 78dbe7e91..7a460b7c4 100644
--- a/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java
@@ -28,14 +28,11 @@ public class CarcellProtocolEncoder extends StringProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_ENGINE_STOP:
-                return formatCommand(command, "$SRVCMD,%s,BA#\r\n", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_ENGINE_RESUME:
-                return formatCommand(command, "$SRVCMD,%s,BD#\r\n", Command.KEY_UNIQUE_ID);
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP -> formatCommand(command, "$SRVCMD,%s,BA#\r\n", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ENGINE_RESUME -> formatCommand(command, "$SRVCMD,%s,BD#\r\n", Command.KEY_UNIQUE_ID);
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/CastelProtocolDecoder.java b/src/main/java/org/traccar/protocol/CastelProtocolDecoder.java
index b076b9f66..5cabeb5a4 100644
--- a/src/main/java/org/traccar/protocol/CastelProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/CastelProtocolDecoder.java
@@ -162,20 +162,12 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
             if (!PID_LENGTH_MAP.containsKey(pids[i])) {
                 throw new RuntimeException(String.format("Unknown PID 0x%02x", pids[i]));
             }
-            switch (PID_LENGTH_MAP.get(pids[i])) {
-                case 1:
-                    value = buf.readUnsignedByte();
-                    break;
-                case 2:
-                    value = buf.readUnsignedShortLE();
-                    break;
-                case 4:
-                    value = buf.readIntLE();
-                    break;
-                default:
-                    value = 0;
-                    break;
-            }
+            value = switch (PID_LENGTH_MAP.get(pids[i])) {
+                case 1 -> buf.readUnsignedByte();
+                case 2 -> buf.readUnsignedShortLE();
+                case 4 -> buf.readIntLE();
+                default -> 0;
+            };
             position.add(ObdDecoder.decodeData(pids[i], value, false));
         }
     }
@@ -250,62 +242,24 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
 
     private void decodeAlarm(Position position, int alarm) {
         switch (alarm) {
-            case 0x01:
-                position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
-                break;
-            case 0x02:
-                position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
-                break;
-            case 0x03:
-                position.set(Position.KEY_ALARM, Position.ALARM_TEMPERATURE);
-                break;
-            case 0x04:
-                position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
-                break;
-            case 0x05:
-                position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
-                break;
-            case 0x06:
-                position.set(Position.KEY_ALARM, Position.ALARM_IDLE);
-                break;
-            case 0x07:
-                position.set(Position.KEY_ALARM, Position.ALARM_TOW);
-                break;
-            case 0x08:
-                position.set(Position.KEY_ALARM, Position.ALARM_HIGH_RPM);
-                break;
-            case 0x09:
-                position.set(Position.KEY_ALARM, Position.ALARM_POWER_ON);
-                break;
-            case 0x0B:
-                position.set(Position.KEY_ALARM, Position.ALARM_LANE_CHANGE);
-                break;
-            case 0x0C:
-                position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
-                break;
-            case 0x0D:
-                position.set(Position.KEY_ALARM, Position.ALARM_FATIGUE_DRIVING);
-                break;
-            case 0x0E:
-                position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
-                break;
-            case 0x11:
-                position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
-                break;
-            case 0x12:
-                position.set(Position.KEY_ALARM, Position.ALARM_TAMPERING);
-                break;
-            case 0x16:
-                position.set(Position.KEY_IGNITION, true);
-                break;
-            case 0x17:
-                position.set(Position.KEY_IGNITION, false);
-                break;
-            case 0x1C:
-                position.set(Position.KEY_ALARM, Position.ALARM_VIBRATION);
-                break;
-            default:
-                break;
+            case 0x01 -> position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+            case 0x02 -> position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+            case 0x03 -> position.set(Position.KEY_ALARM, Position.ALARM_TEMPERATURE);
+            case 0x04 -> position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+            case 0x05 -> position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+            case 0x06 -> position.set(Position.KEY_ALARM, Position.ALARM_IDLE);
+            case 0x07 -> position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+            case 0x08 -> position.set(Position.KEY_ALARM, Position.ALARM_HIGH_RPM);
+            case 0x09 -> position.set(Position.KEY_ALARM, Position.ALARM_POWER_ON);
+            case 0x0B -> position.set(Position.KEY_ALARM, Position.ALARM_LANE_CHANGE);
+            case 0x0C -> position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+            case 0x0D -> position.set(Position.KEY_ALARM, Position.ALARM_FATIGUE_DRIVING);
+            case 0x0E -> position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
+            case 0x11 -> position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
+            case 0x12 -> position.set(Position.KEY_ALARM, Position.ALARM_TAMPERING);
+            case 0x16 -> position.set(Position.KEY_IGNITION, true);
+            case 0x17 -> position.set(Position.KEY_IGNITION, false);
+            case 0x1C -> position.set(Position.KEY_ALARM, Position.ALARM_VIBRATION);
         }
     }
 
@@ -623,15 +577,11 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        switch (version) {
-            case -1:
-                return decodeMpip(channel, remoteAddress, buf, version, id, type, deviceSession);
-            case 3:
-            case 4:
-                return decodeSc(channel, remoteAddress, buf, version, id, type, deviceSession);
-            default:
-                return decodeCc(channel, remoteAddress, buf, version, id, type, deviceSession);
-        }
+        return switch (version) {
+            case -1 -> decodeMpip(channel, remoteAddress, buf, version, id, type, deviceSession);
+            case 3, 4 -> decodeSc(channel, remoteAddress, buf, version, id, type, deviceSession);
+            default -> decodeCc(channel, remoteAddress, buf, version, id, type, deviceSession);
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java b/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java
index 61dde3e80..867db7a09 100644
--- a/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java
@@ -59,16 +59,17 @@ public class CastelProtocolEncoder extends BaseProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
         ByteBuf content = Unpooled.buffer(0);
-        switch (command.getType()) {
-            case Command.TYPE_ENGINE_STOP:
+        return switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP -> {
                 content.writeByte(1);
-                return encodeContent(command.getDeviceId(), CastelProtocolDecoder.MSG_CC_PETROL_CONTROL, content);
-            case Command.TYPE_ENGINE_RESUME:
+                yield encodeContent(command.getDeviceId(), CastelProtocolDecoder.MSG_CC_PETROL_CONTROL, content);
+            }
+            case Command.TYPE_ENGINE_RESUME -> {
                 content.writeByte(0);
-                return encodeContent(command.getDeviceId(), CastelProtocolDecoder.MSG_CC_PETROL_CONTROL, content);
-            default:
-                return null;
-        }
+                yield encodeContent(command.getDeviceId(), CastelProtocolDecoder.MSG_CC_PETROL_CONTROL, content);
+            }
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/CellocatorFrameDecoder.java b/src/main/java/org/traccar/protocol/CellocatorFrameDecoder.java
index ee2adde6d..6dc299c7a 100644
--- a/src/main/java/org/traccar/protocol/CellocatorFrameDecoder.java
+++ b/src/main/java/org/traccar/protocol/CellocatorFrameDecoder.java
@@ -35,28 +35,20 @@ public class CellocatorFrameDecoder extends BaseFrameDecoder {
         int length = 0;
         int type = buf.getUnsignedByte(4);
         switch (type) {
-            case CellocatorProtocolDecoder.MSG_CLIENT_STATUS:
-                length = 70;
-                break;
-            case CellocatorProtocolDecoder.MSG_CLIENT_PROGRAMMING:
-                length = 31;
-                break;
-            case CellocatorProtocolDecoder.MSG_CLIENT_SERIAL_LOG:
-                length = 70;
-                break;
-            case CellocatorProtocolDecoder.MSG_CLIENT_SERIAL:
+            case CellocatorProtocolDecoder.MSG_CLIENT_STATUS -> length = 70;
+            case CellocatorProtocolDecoder.MSG_CLIENT_PROGRAMMING -> length = 31;
+            case CellocatorProtocolDecoder.MSG_CLIENT_SERIAL_LOG -> length = 70;
+            case CellocatorProtocolDecoder.MSG_CLIENT_SERIAL -> {
                 if (buf.readableBytes() >= 19) {
                     length = 19 + buf.getUnsignedShortLE(buf.readerIndex() + 16);
                 }
-                break;
-            case CellocatorProtocolDecoder.MSG_CLIENT_MODULAR:
+            }
+            case CellocatorProtocolDecoder.MSG_CLIENT_MODULAR -> {
                 length = 15 + buf.getUnsignedByte(buf.readerIndex() + 13);
-                break;
-            case CellocatorProtocolDecoder.MSG_CLIENT_MODULAR_EXT:
+            }
+            case CellocatorProtocolDecoder.MSG_CLIENT_MODULAR_EXT -> {
                 length = 16 + buf.getUnsignedShortLE(buf.readerIndex() + 13);
-                break;
-            default:
-                break;
+            }
         }
 
         if (length > 0 && buf.readableBytes() >= length) {
diff --git a/src/main/java/org/traccar/protocol/CellocatorProtocolDecoder.java b/src/main/java/org/traccar/protocol/CellocatorProtocolDecoder.java
index 3573a95ca..27fc8452c 100644
--- a/src/main/java/org/traccar/protocol/CellocatorProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/CellocatorProtocolDecoder.java
@@ -95,16 +95,12 @@ public class CellocatorProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private String decodeAlarm(short reason) {
-        switch (reason) {
-            case 70:
-                return Position.ALARM_SOS;
-            case 80:
-                return Position.ALARM_POWER_CUT;
-            case 81:
-                return Position.ALARM_LOW_POWER;
-            default:
-                return null;
-        }
+        return switch (reason) {
+            case 70 -> Position.ALARM_SOS;
+            case 80 -> Position.ALARM_POWER_CUT;
+            case 81 -> Position.ALARM_LOW_POWER;
+            default -> null;
+        };
     }
 
     private Position decodeStatus(ByteBuf buf, DeviceSession deviceSession, boolean alternative) {
diff --git a/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java b/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java
index 76fa67686..738eabbb2 100644
--- a/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java
@@ -69,14 +69,12 @@ public class CellocatorProtocolEncoder extends BaseProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_OUTPUT_CONTROL:
-                int data = Integer.parseInt(command.getString(Command.KEY_DATA)) << 4
-                        + command.getInteger(Command.KEY_INDEX);
-                return encodeCommand(command.getDeviceId(), 0x03, data, 0);
-            default:
-                return null;
+        if (command.getType().equals(Command.TYPE_OUTPUT_CONTROL)) {
+            int data = Integer.parseInt(command.getString(Command.KEY_DATA)) << 4
+                    + command.getInteger(Command.KEY_INDEX);
+            return encodeCommand(command.getDeviceId(), 0x03, data, 0);
         }
+        return null;
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/CguardProtocolDecoder.java b/src/main/java/org/traccar/protocol/CguardProtocolDecoder.java
index 90f8e0caf..fef90dbb5 100644
--- a/src/main/java/org/traccar/protocol/CguardProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/CguardProtocolDecoder.java
@@ -94,25 +94,17 @@ public class CguardProtocolDecoder extends BaseProtocolDecoder {
             String key = data[i * 2];
             String value = data[i * 2 + 1];
             switch (key) {
-                case "CSQ1":
-                    position.set(Position.KEY_RSSI, Integer.parseInt(value));
-                    break;
-                case "NSQ1":
-                    position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
-                    break;
-                case "BAT1":
+                case "CSQ1" -> position.set(Position.KEY_RSSI, Integer.parseInt(value));
+                case "NSQ1" -> position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
+                case "BAT1" -> {
                     if (value.contains(".")) {
                         position.set(Position.KEY_BATTERY, Double.parseDouble(value));
                     } else {
                         position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(value));
                     }
-                    break;
-                case "PWR1":
-                    position.set(Position.KEY_POWER, Double.parseDouble(value));
-                    break;
-                default:
-                    position.set(key.toLowerCase(), value);
-                    break;
+                }
+                case "PWR1" -> position.set(Position.KEY_POWER, Double.parseDouble(value));
+                default -> position.set(key.toLowerCase(), value);
             }
         }
 
diff --git a/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java b/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
index 934105862..563d13206 100644
--- a/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
@@ -53,15 +53,18 @@ public class CityeasyProtocolEncoder extends BaseProtocolEncoder {
         ByteBuf content = Unpooled.buffer();
 
         switch (command.getType()) {
-            case Command.TYPE_POSITION_SINGLE:
+            case Command.TYPE_POSITION_SINGLE -> {
                 return encodeContent(CityeasyProtocolDecoder.MSG_LOCATION_REQUEST, content);
-            case Command.TYPE_POSITION_PERIODIC:
+            }
+            case Command.TYPE_POSITION_PERIODIC -> {
                 content.writeShort(command.getInteger(Command.KEY_FREQUENCY));
                 return encodeContent(CityeasyProtocolDecoder.MSG_LOCATION_INTERVAL, content);
-            case Command.TYPE_POSITION_STOP:
+            }
+            case Command.TYPE_POSITION_STOP -> {
                 content.writeShort(0);
                 return encodeContent(CityeasyProtocolDecoder.MSG_LOCATION_INTERVAL, content);
-            case Command.TYPE_SET_TIMEZONE:
+            }
+            case Command.TYPE_SET_TIMEZONE -> {
                 int timezone = TimeZone.getTimeZone(command.getString(Command.KEY_TIMEZONE)).getRawOffset() / 60000;
                 if (timezone < 0) {
                     content.writeByte(1);
@@ -70,8 +73,10 @@ public class CityeasyProtocolEncoder extends BaseProtocolEncoder {
                 }
                 content.writeShort(Math.abs(timezone));
                 return encodeContent(CityeasyProtocolDecoder.MSG_TIMEZONE, content);
-            default:
+            }
+            default -> {
                 return null;
+            }
         }
     }
 
diff --git a/src/main/java/org/traccar/protocol/DmtHttpProtocolDecoder.java b/src/main/java/org/traccar/protocol/DmtHttpProtocolDecoder.java
index c2e617a2a..672848174 100644
--- a/src/main/java/org/traccar/protocol/DmtHttpProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/DmtHttpProtocolDecoder.java
@@ -199,15 +199,9 @@ public class DmtHttpProtocolDecoder extends BaseHttpProtocolDecoder {
             for (int i = 0; i < counters.size(); i++) {
                 JsonObject counter = counters.getJsonObject(i);
                 switch (counter.getInt("id")) {
-                    case 0:
-                        position.set(Position.KEY_BATTERY, counter.getInt("val") * 0.001);
-                        break;
-                    case 1:
-                        position.set(Position.KEY_BATTERY_LEVEL, counter.getInt("val") * 0.01);
-                        break;
-                    default:
-                        position.set("counter" + counter.getInt("id"), counter.getInt("val"));
-                        break;
+                    case 0 -> position.set(Position.KEY_BATTERY, counter.getInt("val") * 0.001);
+                    case 1 -> position.set(Position.KEY_BATTERY_LEVEL, counter.getInt("val") * 0.01);
+                    default -> position.set("counter" + counter.getInt("id"), counter.getInt("val"));
                 }
 
             }
diff --git a/src/main/java/org/traccar/protocol/DmtProtocolDecoder.java b/src/main/java/org/traccar/protocol/DmtProtocolDecoder.java
index f8295543f..a18e8bc53 100644
--- a/src/main/java/org/traccar/protocol/DmtProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/DmtProtocolDecoder.java
@@ -201,24 +201,12 @@ public class DmtProtocolDecoder extends BaseProtocolDecoder {
                     while (buf.readerIndex() < fieldEnd) {
                         int number = buf.readUnsignedByte();
                         switch (number) {
-                            case 1:
-                                position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
-                                break;
-                            case 2:
-                                position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.01);
-                                break;
-                            case 3:
-                                position.set(Position.KEY_DEVICE_TEMP, buf.readShortLE() * 0.01);
-                                break;
-                            case 4:
-                                position.set(Position.KEY_RSSI, buf.readUnsignedShortLE());
-                                break;
-                            case 5:
-                                position.set("solarPower", buf.readUnsignedShortLE() * 0.001);
-                                break;
-                            default:
-                                position.set(Position.PREFIX_IO + number, buf.readUnsignedShortLE());
-                                break;
+                            case 1 -> position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+                            case 2 -> position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.01);
+                            case 3 -> position.set(Position.KEY_DEVICE_TEMP, buf.readShortLE() * 0.01);
+                            case 4 -> position.set(Position.KEY_RSSI, buf.readUnsignedShortLE());
+                            case 5 -> position.set("solarPower", buf.readUnsignedShortLE() * 0.001);
+                            default -> position.set(Position.PREFIX_IO + number, buf.readUnsignedShortLE());
                         }
                     }
 
@@ -249,28 +237,18 @@ public class DmtProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private String decodeAlarm(int value) {
-        switch (value) {
-            case 12:
-                return Position.ALARM_BRAKING;
-            case 13:
-                return Position.ALARM_ACCELERATION;
-            case 14:
-                return Position.ALARM_CORNERING;
-            case 18:
-                return Position.ALARM_OVERSPEED;
-            case 20:
-                return Position.ALARM_TOW;
-            case 23:
-                return Position.ALARM_ACCIDENT;
-            case 29:
-                return Position.ALARM_TAMPERING;
-            case 44:
-                return Position.ALARM_GEOFENCE_ENTER;
-            case 45:
-                return Position.ALARM_GEOFENCE_EXIT;
-            default:
-                return null;
-        }
+        return switch (value) {
+            case 12 -> Position.ALARM_BRAKING;
+            case 13 -> Position.ALARM_ACCELERATION;
+            case 14 -> Position.ALARM_CORNERING;
+            case 18 -> Position.ALARM_OVERSPEED;
+            case 20 -> Position.ALARM_TOW;
+            case 23 -> Position.ALARM_ACCIDENT;
+            case 29 -> Position.ALARM_TAMPERING;
+            case 44 -> Position.ALARM_GEOFENCE_ENTER;
+            case 45 -> Position.ALARM_GEOFENCE_EXIT;
+            default -> null;
+        };
     }
 
     @Override
diff --git a/src/main/java/org/traccar/protocol/EasyTrackProtocolEncoder.java b/src/main/java/org/traccar/protocol/EasyTrackProtocolEncoder.java
index 3f2a142d6..124c3e0a3 100644
--- a/src/main/java/org/traccar/protocol/EasyTrackProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/EasyTrackProtocolEncoder.java
@@ -28,18 +28,13 @@ public class EasyTrackProtocolEncoder extends StringProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_ENGINE_STOP:
-                return formatCommand(command, "*ET,%s,FD,Y1#", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_ENGINE_RESUME:
-                return formatCommand(command, "*ET,%s,FD,Y2#", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_ALARM_ARM:
-                return formatCommand(command, "*ET,%s,FD,F1#", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_ALARM_DISARM:
-                return formatCommand(command, "*ET,%s,FD,F2#", Command.KEY_UNIQUE_ID);
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP -> formatCommand(command, "*ET,%s,FD,Y1#", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ENGINE_RESUME -> formatCommand(command, "*ET,%s,FD,Y2#", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_ARM -> formatCommand(command, "*ET,%s,FD,F1#", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_DISARM -> formatCommand(command, "*ET,%s,FD,F2#", Command.KEY_UNIQUE_ID);
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/EelinkProtocolDecoder.java b/src/main/java/org/traccar/protocol/EelinkProtocolDecoder.java
index db1b365c3..f1cc43394 100644
--- a/src/main/java/org/traccar/protocol/EelinkProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/EelinkProtocolDecoder.java
@@ -67,35 +67,21 @@ public class EelinkProtocolDecoder extends BaseProtocolDecoder {
     public static final int MSG_CAMERA_DATA = 0x1F;
 
     private String decodeAlarm(Short value) {
-        switch (value) {
-            case 0x01:
-                return Position.ALARM_POWER_OFF;
-            case 0x02:
-                return Position.ALARM_SOS;
-            case 0x03:
-                return Position.ALARM_LOW_BATTERY;
-            case 0x04:
-                return Position.ALARM_VIBRATION;
-            case 0x08:
-            case 0x09:
-                return Position.ALARM_GPS_ANTENNA_CUT;
-            case 0x25:
-                return Position.ALARM_REMOVING;
-            case 0x81:
-                return Position.ALARM_LOW_SPEED;
-            case 0x82:
-                return Position.ALARM_OVERSPEED;
-            case 0x83:
-                return Position.ALARM_GEOFENCE_ENTER;
-            case 0x84:
-                return Position.ALARM_GEOFENCE_EXIT;
-            case 0x85:
-                return Position.ALARM_ACCIDENT;
-            case 0x86:
-                return Position.ALARM_FALL_DOWN;
-            default:
-                return null;
-        }
+        return switch (value) {
+            case 0x01 -> Position.ALARM_POWER_OFF;
+            case 0x02 -> Position.ALARM_SOS;
+            case 0x03 -> Position.ALARM_LOW_BATTERY;
+            case 0x04 -> Position.ALARM_VIBRATION;
+            case 0x08, 0x09 -> Position.ALARM_GPS_ANTENNA_CUT;
+            case 0x25 -> Position.ALARM_REMOVING;
+            case 0x81 -> Position.ALARM_LOW_SPEED;
+            case 0x82 -> Position.ALARM_OVERSPEED;
+            case 0x83 -> Position.ALARM_GEOFENCE_ENTER;
+            case 0x84 -> Position.ALARM_GEOFENCE_EXIT;
+            case 0x85 -> Position.ALARM_ACCIDENT;
+            case 0x86 -> Position.ALARM_FALL_DOWN;
+            default -> null;
+        };
     }
 
     private void decodeStatus(Position position, int status) {
@@ -407,17 +393,9 @@ public class EelinkProtocolDecoder extends BaseProtocolDecoder {
             int pid = buf.readUnsignedByte();
             int value = buf.readInt();
             switch (pid) {
-                case 0x89:
-                    position.set(Position.KEY_FUEL_CONSUMPTION, value);
-                    break;
-                case 0x8a:
-                    position.set(Position.KEY_ODOMETER, value * 1000L);
-                    break;
-                case 0x8b:
-                    position.set(Position.KEY_FUEL_LEVEL, value / 10);
-                    break;
-                default:
-                    break;
+                case 0x89 -> position.set(Position.KEY_FUEL_CONSUMPTION, value);
+                case 0x8a -> position.set(Position.KEY_ODOMETER, value * 1000L);
+                case 0x8b -> position.set(Position.KEY_FUEL_LEVEL, value / 10);
             }
         }
 
diff --git a/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java b/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java
index 3673c35b3..d3f7aa30b 100644
--- a/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java
@@ -90,20 +90,14 @@ public class EelinkProtocolEncoder extends BaseProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_CUSTOM:
-                return encodeContent(command.getDeviceId(), command.getString(Command.KEY_DATA));
-            case Command.TYPE_POSITION_SINGLE:
-                return encodeContent(command.getDeviceId(), "WHERE#");
-            case Command.TYPE_ENGINE_STOP:
-                return encodeContent(command.getDeviceId(), "RELAY,1#");
-            case Command.TYPE_ENGINE_RESUME:
-                return encodeContent(command.getDeviceId(), "RELAY,0#");
-            case Command.TYPE_REBOOT_DEVICE:
-                return encodeContent(command.getDeviceId(), "RESET#");
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_CUSTOM -> encodeContent(command.getDeviceId(), command.getString(Command.KEY_DATA));
+            case Command.TYPE_POSITION_SINGLE -> encodeContent(command.getDeviceId(), "WHERE#");
+            case Command.TYPE_ENGINE_STOP -> encodeContent(command.getDeviceId(), "RELAY,1#");
+            case Command.TYPE_ENGINE_RESUME -> encodeContent(command.getDeviceId(), "RELAY,0#");
+            case Command.TYPE_REBOOT_DEVICE -> encodeContent(command.getDeviceId(), "RESET#");
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java b/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java
index 8cc24dc0f..7cd10a2ed 100644
--- a/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java
@@ -45,16 +45,12 @@ public class EnforaProtocolEncoder extends StringProtocolEncoder {
 
     @Override
     protected Object encodeCommand(Command command) {
-        switch (command.getType()) {
-            case Command.TYPE_CUSTOM:
-                return encodeContent(command.getString(Command.KEY_DATA));
-            case Command.TYPE_ENGINE_STOP:
-                return encodeContent("AT$IOGP3=1");
-            case Command.TYPE_ENGINE_RESUME:
-                return encodeContent("AT$IOGP3=0");
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_CUSTOM -> encodeContent(command.getString(Command.KEY_DATA));
+            case Command.TYPE_ENGINE_STOP -> encodeContent("AT$IOGP3=1");
+            case Command.TYPE_ENGINE_RESUME -> encodeContent("AT$IOGP3=0");
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/EnvotechProtocolDecoder.java b/src/main/java/org/traccar/protocol/EnvotechProtocolDecoder.java
index 750ff2bda..f4d1f5747 100644
--- a/src/main/java/org/traccar/protocol/EnvotechProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/EnvotechProtocolDecoder.java
@@ -75,14 +75,8 @@ public class EnvotechProtocolDecoder extends BaseProtocolDecoder {
 
         int event = parser.nextHexInt();
         switch (event) {
-            case 0x60:
-                position.set(Position.KEY_ALARM, Position.ALARM_LOCK);
-                break;
-            case 0x61:
-                position.set(Position.KEY_ALARM, Position.ALARM_UNLOCK);
-                break;
-            default:
-                break;
+            case 0x60 -> position.set(Position.KEY_ALARM, Position.ALARM_LOCK);
+            case 0x61 -> position.set(Position.KEY_ALARM, Position.ALARM_UNLOCK);
         }
         position.set(Position.KEY_EVENT, event);
 
diff --git a/src/main/java/org/traccar/protocol/EsealProtocolDecoder.java b/src/main/java/org/traccar/protocol/EsealProtocolDecoder.java
index dd15c4276..7958265c3 100644
--- a/src/main/java/org/traccar/protocol/EsealProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/EsealProtocolDecoder.java
@@ -74,20 +74,14 @@ public class EsealProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private String decodeAlarm(String type) {
-        switch (type) {
-            case "Event-Door":
-                return Position.ALARM_DOOR;
-            case "Event-Shock":
-                return Position.ALARM_VIBRATION;
-            case "Event-Drop":
-                return Position.ALARM_FALL_DOWN;
-            case "Event-Lock":
-                return Position.ALARM_LOCK;
-            case "Event-RC-Unlock":
-                return Position.ALARM_UNLOCK;
-            default:
-                return null;
-        }
+        return switch (type) {
+            case "Event-Door" -> Position.ALARM_DOOR;
+            case "Event-Shock" -> Position.ALARM_VIBRATION;
+            case "Event-Drop" -> Position.ALARM_FALL_DOWN;
+            case "Event-Lock" -> Position.ALARM_LOCK;
+            case "Event-RC-Unlock" -> Position.ALARM_UNLOCK;
+            default -> null;
+        };
     }
 
     @Override
@@ -141,14 +135,8 @@ public class EsealProtocolDecoder extends BaseProtocolDecoder {
         position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
 
         switch (parser.next()) {
-            case "Open":
-                position.set(Position.KEY_DOOR, true);
-                break;
-            case "Close":
-                position.set(Position.KEY_DOOR, false);
-                break;
-            default:
-                break;
+            case "Open" -> position.set(Position.KEY_DOOR, true);
+            case "Close" -> position.set(Position.KEY_DOOR, false);
         }
 
         position.set(Position.KEY_ACCELERATION, parser.nextDouble());
diff --git a/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java b/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java
index 74f9e22ab..4af36b245 100644
--- a/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java
@@ -28,19 +28,15 @@ public class EsealProtocolEncoder extends StringProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_CUSTOM:
-                return formatCommand(
-                        command, "##S,eSeal,%s,256,3.0.8,%s,E##", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
-            case Command.TYPE_ALARM_ARM:
-                return formatCommand(
-                        command, "##S,eSeal,%s,256,3.0.8,RC-Power Control,Power OFF,E##", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_ALARM_DISARM:
-                return formatCommand(
-                        command, "##S,eSeal,%s,256,3.0.8,RC-Unlock,E##", Command.KEY_UNIQUE_ID);
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_CUSTOM -> formatCommand(
+                    command, "##S,eSeal,%s,256,3.0.8,%s,E##", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
+            case Command.TYPE_ALARM_ARM -> formatCommand(
+                    command, "##S,eSeal,%s,256,3.0.8,RC-Power Control,Power OFF,E##", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_DISARM -> formatCommand(
+                    command, "##S,eSeal,%s,256,3.0.8,RC-Unlock,E##", Command.KEY_UNIQUE_ID);
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/FifotrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/FifotrackProtocolDecoder.java
index 59019830f..0a0392acd 100644
--- a/src/main/java/org/traccar/protocol/FifotrackProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/FifotrackProtocolDecoder.java
@@ -157,50 +157,28 @@ public class FifotrackProtocolDecoder extends BaseProtocolDecoder {
 
     private String decodeAlarm(Integer alarm) {
         if (alarm != null) {
-            switch (alarm) {
-                case 2:
-                    return Position.ALARM_SOS;
-                case 14:
-                    return Position.ALARM_LOW_POWER;
-                case 15:
-                    return Position.ALARM_POWER_CUT;
-                case 16:
-                    return Position.ALARM_POWER_RESTORED;
-                case 17:
-                    return Position.ALARM_LOW_BATTERY;
-                case 18:
-                    return Position.ALARM_OVERSPEED;
-                case 20:
-                    return Position.ALARM_GPS_ANTENNA_CUT;
-                case 21:
-                    return Position.ALARM_VIBRATION;
-                case 23:
-                    return Position.ALARM_ACCELERATION;
-                case 24:
-                    return Position.ALARM_BRAKING;
-                case 27:
-                    return Position.ALARM_FATIGUE_DRIVING;
-                case 30:
-                case 32:
-                    return Position.ALARM_JAMMING;
-                case 31:
-                    return Position.ALARM_FALL_DOWN;
-                case 33:
-                    return Position.ALARM_GEOFENCE_EXIT;
-                case 34:
-                    return Position.ALARM_GEOFENCE_ENTER;
-                case 35:
-                    return Position.ALARM_IDLE;
-                case 40:
-                case 41:
-                    return Position.ALARM_TEMPERATURE;
-                case 53:
-                    return Position.ALARM_POWER_ON;
-                case 54:
-                    return Position.ALARM_POWER_OFF;
-                default:
-                    return null;
-            }
+            return switch (alarm) {
+                case 2 -> Position.ALARM_SOS;
+                case 14 -> Position.ALARM_LOW_POWER;
+                case 15 -> Position.ALARM_POWER_CUT;
+                case 16 -> Position.ALARM_POWER_RESTORED;
+                case 17 -> Position.ALARM_LOW_BATTERY;
+                case 18 -> Position.ALARM_OVERSPEED;
+                case 20 -> Position.ALARM_GPS_ANTENNA_CUT;
+                case 21 -> Position.ALARM_VIBRATION;
+                case 23 -> Position.ALARM_ACCELERATION;
+                case 24 -> Position.ALARM_BRAKING;
+                case 27 -> Position.ALARM_FATIGUE_DRIVING;
+                case 30, 32 -> Position.ALARM_JAMMING;
+                case 31 -> Position.ALARM_FALL_DOWN;
+                case 33 -> Position.ALARM_GEOFENCE_EXIT;
+                case 34 -> Position.ALARM_GEOFENCE_ENTER;
+                case 35 -> Position.ALARM_IDLE;
+                case 40, 41 -> Position.ALARM_TEMPERATURE;
+                case 53 -> Position.ALARM_POWER_ON;
+                case 54 -> Position.ALARM_POWER_OFF;
+                default -> null;
+            };
         }
         return null;
     }
diff --git a/src/main/java/org/traccar/protocol/FifotrackProtocolEncoder.java b/src/main/java/org/traccar/protocol/FifotrackProtocolEncoder.java
index a4e69b47b..2c01fc691 100644
--- a/src/main/java/org/traccar/protocol/FifotrackProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/FifotrackProtocolEncoder.java
@@ -37,14 +37,11 @@ public class FifotrackProtocolEncoder extends StringProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_CUSTOM:
-                return formatCommand(command, command.getString(Command.KEY_DATA));
-            case Command.TYPE_REQUEST_PHOTO:
-                return formatCommand(command, "D05,3");
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_CUSTOM -> formatCommand(command, command.getString(Command.KEY_DATA));
+            case Command.TYPE_REQUEST_PHOTO -> formatCommand(command, "D05,3");
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/FleetGuideProtocolDecoder.java b/src/main/java/org/traccar/protocol/FleetGuideProtocolDecoder.java
index 8f679525b..6163a24c8 100644
--- a/src/main/java/org/traccar/protocol/FleetGuideProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/FleetGuideProtocolDecoder.java
@@ -205,17 +205,9 @@ public class FleetGuideProtocolDecoder extends BaseProtocolDecoder {
                 case 18:
                     int sensorIndex = data.readUnsignedByte();
                     switch (recordLength - 1) {
-                        case 1:
-                            position.set("sensor" + sensorIndex, data.readUnsignedByte());
-                            break;
-                        case 2:
-                            position.set("sensor" + sensorIndex, data.readUnsignedShortLE());
-                            break;
-                        case 4:
-                            position.set("sensor" + sensorIndex, data.readUnsignedIntLE());
-                            break;
-                        default:
-                            break;
+                        case 1 -> position.set("sensor" + sensorIndex, data.readUnsignedByte());
+                        case 2 -> position.set("sensor" + sensorIndex, data.readUnsignedShortLE());
+                        case 4 -> position.set("sensor" + sensorIndex, data.readUnsignedIntLE());
                     }
                     break;
                 default:
diff --git a/src/main/java/org/traccar/protocol/FlespiProtocolDecoder.java b/src/main/java/org/traccar/protocol/FlespiProtocolDecoder.java
index 168b3b3cd..e6ea994df 100644
--- a/src/main/java/org/traccar/protocol/FlespiProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/FlespiProtocolDecoder.java
@@ -93,157 +93,193 @@ public class FlespiProtocolDecoder extends BaseHttpProtocolDecoder {
     }
 
     private boolean decodeParam(String name, int index, JsonValue value, Position position) {
-        switch (name) {
-            case "timestamp":
+        return switch (name) {
+            case "timestamp" -> {
                 position.setTime(new Date(((JsonNumber) value).longValue() * 1000));
-                return true;
-            case "position.latitude":
+                yield true;
+            }
+            case "position.latitude" -> {
                 position.setLatitude(((JsonNumber) value).doubleValue());
-                return true;
-            case "position.longitude":
+                yield true;
+            }
+            case "position.longitude" -> {
                 position.setLongitude(((JsonNumber) value).doubleValue());
-                return true;
-            case "position.speed":
+                yield true;
+            }
+            case "position.speed" -> {
                 position.setSpeed(UnitsConverter.knotsFromKph(((JsonNumber) value).doubleValue()));
-                return true;
-            case "position.direction":
+                yield true;
+            }
+            case "position.direction" -> {
                 position.setCourse(((JsonNumber) value).doubleValue());
-                return true;
-            case "position.altitude":
+                yield true;
+            }
+            case "position.altitude" -> {
                 position.setAltitude(((JsonNumber) value).doubleValue());
-                return true;
-            case "position.satellites":
+                yield true;
+            }
+            case "position.satellites" -> {
                 position.set(Position.KEY_SATELLITES, ((JsonNumber) value).intValue());
-                return true;
-            case "position.valid":
+                yield true;
+            }
+            case "position.valid" -> {
                 position.setValid(value == JsonValue.TRUE);
-                return true;
-            case "position.hdop":
+                yield true;
+            }
+            case "position.hdop" -> {
                 position.set(Position.KEY_HDOP, ((JsonNumber) value).doubleValue());
-                return true;
-            case "position.pdop":
+                yield true;
+            }
+            case "position.pdop" -> {
                 position.set(Position.KEY_PDOP, ((JsonNumber) value).doubleValue());
-                return true;
-            case "din":
+                yield true;
+            }
+            case "din" -> {
                 position.set(Position.KEY_INPUT, ((JsonNumber) value).intValue());
-                return true;
-            case "dout":
+                yield true;
+            }
+            case "dout" -> {
                 position.set(Position.KEY_OUTPUT, ((JsonNumber) value).intValue());
-                return true;
-            case "report.reason":
+                yield true;
+            }
+            case "report.reason" -> {
                 position.set(Position.KEY_EVENT, ((JsonNumber) value).intValue());
-                return true;
-            case "gps.vehicle.mileage":
+                yield true;
+            }
+            case "gps.vehicle.mileage" -> {
                 position.set(Position.KEY_ODOMETER, ((JsonNumber) value).doubleValue());
-                return true;
-            case "external.powersource.voltage":
+                yield true;
+            }
+            case "external.powersource.voltage" -> {
                 position.set(Position.KEY_POWER, ((JsonNumber) value).doubleValue());
-                return true;
-            case "battery.voltage":
+                yield true;
+            }
+            case "battery.voltage" -> {
                 position.set(Position.KEY_BATTERY, ((JsonNumber) value).doubleValue());
-                return true;
-            case "battery.level":
+                yield true;
+            }
+            case "battery.level" -> {
                 position.set(Position.KEY_BATTERY_LEVEL, ((JsonNumber) value).intValue());
-                return true;
-            case "fuel.level":
-            case "can.fuel.level":
+                yield true;
+            }
+            case "fuel.level", "can.fuel.level" -> {
                 position.set(Position.KEY_FUEL_LEVEL, ((JsonNumber) value).doubleValue());
-                return true;
-            case "engine.rpm":
-            case "can.engine.rpm":
+                yield true;
+            }
+            case "engine.rpm", "can.engine.rpm" -> {
                 position.set(Position.KEY_RPM, ((JsonNumber) value).doubleValue());
-                return true;
-            case "can.engine.temperature":
+                yield true;
+            }
+            case "can.engine.temperature" -> {
                 position.set(Position.PREFIX_TEMP + Math.max(index, 0), ((JsonNumber) value).doubleValue());
-                return true;
-            case "engine.ignition.status":
+                yield true;
+            }
+            case "engine.ignition.status" -> {
                 position.set(Position.KEY_IGNITION, value == JsonValue.TRUE);
-                return true;
-            case "movement.status":
+                yield true;
+            }
+            case "movement.status" -> {
                 position.set(Position.KEY_MOTION, value == JsonValue.TRUE);
-                return true;
-            case "device.temperature":
+                yield true;
+            }
+            case "device.temperature" -> {
                 position.set(Position.KEY_DEVICE_TEMP, ((JsonNumber) value).doubleValue());
-                return true;
-            case "ibutton.code":
+                yield true;
+            }
+            case "ibutton.code" -> {
                 position.set(Position.KEY_DRIVER_UNIQUE_ID, ((JsonString) value).getString());
-                return true;
-            case "vehicle.vin":
+                yield true;
+            }
+            case "vehicle.vin" -> {
                 position.set(Position.KEY_VIN, ((JsonString) value).getString());
-                return true;
-            case "alarm.event.trigger":
+                yield true;
+            }
+            case "alarm.event.trigger" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
                 }
-                return true;
-            case "towing.event.trigger":
-            case "towing.alarm.status":
+                yield true;
+            }
+            case "towing.event.trigger", "towing.alarm.status" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_TOW);
                 }
-                return true;
-            case "geofence.event.enter":
+                yield true;
+            }
+            case "geofence.event.enter" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_ENTER);
                 }
-                return true;
-            case "geofence.event.exit":
+                yield true;
+            }
+            case "geofence.event.exit" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_EXIT);
                 }
-                return true;
-            case "shock.event.trigger":
+                yield true;
+            }
+            case "shock.event.trigger" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_VIBRATION);
                 }
-                return true;
-            case "overspeeding.event.trigger":
+                yield true;
+            }
+            case "overspeeding.event.trigger" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
                 }
-                return true;
-            case "harsh.acceleration.event.trigger":
+                yield true;
+            }
+            case "harsh.acceleration.event.trigger" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
                 }
-                return true;
-            case "harsh.braking.event.trigger":
+                yield true;
+            }
+            case "harsh.braking.event.trigger" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
                 }
-                return true;
-            case "harsh.cornering.event.trigger":
+                yield true;
+            }
+            case "harsh.cornering.event.trigger" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
                 }
-                return true;
-            case "gnss.antenna.cut.status":
+                yield true;
+            }
+            case "gnss.antenna.cut.status" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_GPS_ANTENNA_CUT);
                 }
-                return true;
-            case "gsm.jamming.event.trigger":
+                yield true;
+            }
+            case "gsm.jamming.event.trigger" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_JAMMING);
                 }
-                return true;
-            case "hood.open.status":
+                yield true;
+            }
+            case "hood.open.status" -> {
                 if (value == JsonValue.TRUE) {
                     position.set(Position.KEY_ALARM, Position.ALARM_BONNET);
                 }
-                return true;
-            case "custom.wln_accel_max":
+                yield true;
+            }
+            case "custom.wln_accel_max" -> {
                 position.set("maxAcceleration", ((JsonNumber) value).doubleValue());
-                return true;
-            case "custom.wln_brk_max":
+                yield true;
+            }
+            case "custom.wln_brk_max" -> {
                 position.set("maxBraking", ((JsonNumber) value).doubleValue());
-                return true;
-            case "custom.wln_crn_max":
+                yield true;
+            }
+            case "custom.wln_crn_max" -> {
                 position.set("maxCornering", ((JsonNumber) value).doubleValue());
-                return true;
-            default:
-                return false;
-        }
+                yield true;
+            }
+            default -> false;
+        };
     }
 
     private void decodeUnknownParam(String name, JsonValue value, Position position) {
diff --git a/src/main/java/org/traccar/protocol/FlexApiProtocolDecoder.java b/src/main/java/org/traccar/protocol/FlexApiProtocolDecoder.java
index fb76673ca..c39f774b7 100644
--- a/src/main/java/org/traccar/protocol/FlexApiProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/FlexApiProtocolDecoder.java
@@ -93,17 +93,9 @@ public class FlexApiProtocolDecoder extends BaseProtocolDecoder {
                         Integer.parseInt(payload.getString("modem1.cell_id"), 16),
                         payload.getInt("modem1.rssi"));
                 switch (payload.getInt("modem1.network")) {
-                    case 1:
-                        cellTower.setRadioType("gsm");
-                        break;
-                    case 2:
-                        cellTower.setRadioType("wcdma");
-                        break;
-                    case 3:
-                        cellTower.setRadioType("lte");
-                        break;
-                    default:
-                        break;
+                    case 1 -> cellTower.setRadioType("gsm");
+                    case 2 -> cellTower.setRadioType("wcdma");
+                    case 3 -> cellTower.setRadioType("lte");
                 }
                 position.setNetwork(new Network(cellTower));
             }
diff --git a/src/main/java/org/traccar/protocol/FreematicsProtocolDecoder.java b/src/main/java/org/traccar/protocol/FreematicsProtocolDecoder.java
index d0402cc94..d7d9d62ed 100644
--- a/src/main/java/org/traccar/protocol/FreematicsProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/FreematicsProtocolDecoder.java
@@ -48,20 +48,13 @@ public class FreematicsProtocolDecoder extends BaseProtocolDecoder {
             String key = data[0];
             String value = data[1];
             switch (key) {
-                case "ID":
-                case "VIN":
+                case "ID", "VIN" -> {
                     if (deviceSession == null) {
                         deviceSession = getDeviceSession(channel, remoteAddress, value);
                     }
-                    break;
-                case "EV":
-                    event = value;
-                    break;
-                case "TS":
-                    time = value;
-                    break;
-                default:
-                    break;
+                }
+                case "EV" -> event = value;
+                case "TS" -> time = value;
             }
         }
 
@@ -105,74 +98,44 @@ public class FreematicsProtocolDecoder extends BaseProtocolDecoder {
                 dateBuilder = new DateBuilder(new Date());
             } else if (position != null) {
                 switch (key) {
-                    case 0x11:
+                    case 0x11 -> {
                         value = ("000000" + value).substring(value.length());
                         dateBuilder.setDateReverse(
                                 Integer.parseInt(value.substring(0, 2)),
                                 Integer.parseInt(value.substring(2, 4)),
                                 Integer.parseInt(value.substring(4)));
-                        break;
-                    case 0x10:
+                    }
+                    case 0x10 -> {
                         value = ("00000000" + value).substring(value.length());
                         dateBuilder.setTime(
                                 Integer.parseInt(value.substring(0, 2)),
                                 Integer.parseInt(value.substring(2, 4)),
                                 Integer.parseInt(value.substring(4, 6)),
                                 Integer.parseInt(value.substring(6)) * 10);
-                        break;
-                    case 0xA:
+                    }
+                    case 0xA -> {
                         position.setValid(true);
                         position.setLatitude(Double.parseDouble(value));
-                        break;
-                    case 0xB:
+                    }
+                    case 0xB -> {
                         position.setValid(true);
                         position.setLongitude(Double.parseDouble(value));
-                        break;
-                    case 0xC:
-                        position.setAltitude(Double.parseDouble(value));
-                        break;
-                    case 0xD:
-                        position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(value)));
-                        break;
-                    case 0xE:
-                        position.setCourse(Integer.parseInt(value));
-                        break;
-                    case 0xF:
-                        position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
-                        break;
-                    case 0x12:
-                        position.set(Position.KEY_HDOP, Integer.parseInt(value));
-                        break;
-                    case 0x20:
-                        position.set(Position.KEY_ACCELERATION, value);
-                        break;
-                    case 0x24:
-                        position.set(Position.KEY_BATTERY, Integer.parseInt(value) * 0.01);
-                        break;
-                    case 0x81:
-                        position.set(Position.KEY_RSSI, Integer.parseInt(value));
-                        break;
-                    case 0x82:
-                        position.set(Position.KEY_DEVICE_TEMP, Double.parseDouble(value) * 0.1);
-                        break;
-                    case 0x104:
-                        position.set(Position.KEY_ENGINE_LOAD, Integer.parseInt(value));
-                        break;
-                    case 0x105:
-                        position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(value));
-                        break;
-                    case 0x10c:
-                        position.set(Position.KEY_RPM, Integer.parseInt(value));
-                        break;
-                    case 0x10d:
-                        position.set(Position.KEY_OBD_SPEED, Integer.parseInt(value));
-                        break;
-                    case 0x111:
-                        position.set(Position.KEY_THROTTLE, Integer.parseInt(value));
-                        break;
-                    default:
-                        position.set(Position.PREFIX_IO + key, value);
-                        break;
+                    }
+                    case 0xC -> position.setAltitude(Double.parseDouble(value));
+                    case 0xD -> position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(value)));
+                    case 0xE -> position.setCourse(Integer.parseInt(value));
+                    case 0xF -> position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
+                    case 0x12 -> position.set(Position.KEY_HDOP, Integer.parseInt(value));
+                    case 0x20 -> position.set(Position.KEY_ACCELERATION, value);
+                    case 0x24 -> position.set(Position.KEY_BATTERY, Integer.parseInt(value) * 0.01);
+                    case 0x81 -> position.set(Position.KEY_RSSI, Integer.parseInt(value));
+                    case 0x82 -> position.set(Position.KEY_DEVICE_TEMP, Double.parseDouble(value) * 0.1);
+                    case 0x104 -> position.set(Position.KEY_ENGINE_LOAD, Integer.parseInt(value));
+                    case 0x105 -> position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(value));
+                    case 0x10c -> position.set(Position.KEY_RPM, Integer.parseInt(value));
+                    case 0x10d -> position.set(Position.KEY_OBD_SPEED, Integer.parseInt(value));
+                    case 0x111 -> position.set(Position.KEY_THROTTLE, Integer.parseInt(value));
+                    default -> position.set(Position.PREFIX_IO + key, value);
                 }
             }
         }
diff --git a/src/main/java/org/traccar/protocol/GalileoProtocolDecoder.java b/src/main/java/org/traccar/protocol/GalileoProtocolDecoder.java
index 44baa94ea..1ac735407 100644
--- a/src/main/java/org/traccar/protocol/GalileoProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/GalileoProtocolDecoder.java
@@ -149,94 +149,42 @@ public class GalileoProtocolDecoder extends BaseProtocolDecoder {
 
     private void decodeTagOther(Position position, ByteBuf buf, int tag) {
         switch (tag) {
-            case 0x01:
-                position.set(Position.KEY_VERSION_HW, buf.readUnsignedByte());
-                break;
-            case 0x02:
-                position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
-                break;
-            case 0x04:
-                position.set("deviceId", buf.readUnsignedShortLE());
-                break;
-            case 0x10:
-                position.set(Position.KEY_INDEX, buf.readUnsignedShortLE());
-                break;
-            case 0x20:
-                position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
-                break;
-            case 0x33:
+            case 0x01 -> position.set(Position.KEY_VERSION_HW, buf.readUnsignedByte());
+            case 0x02 -> position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
+            case 0x04 -> position.set("deviceId", buf.readUnsignedShortLE());
+            case 0x10 -> position.set(Position.KEY_INDEX, buf.readUnsignedShortLE());
+            case 0x20 -> position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
+            case 0x33 -> {
                 position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE() * 0.1));
                 position.setCourse(buf.readUnsignedShortLE() * 0.1);
-                break;
-            case 0x34:
-                position.setAltitude(buf.readShortLE());
-                break;
-            case 0x35:
-                position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
-                break;
-            case 0x40:
-                position.set(Position.KEY_STATUS, buf.readUnsignedShortLE());
-                break;
-            case 0x41:
-                position.set(Position.KEY_POWER, buf.readUnsignedShortLE() / 1000.0);
-                break;
-            case 0x42:
-                position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() / 1000.0);
-                break;
-            case 0x43:
-                position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
-                break;
-            case 0x44:
-                position.set(Position.KEY_ACCELERATION, buf.readUnsignedIntLE());
-                break;
-            case 0x45:
-                position.set(Position.KEY_OUTPUT, buf.readUnsignedShortLE());
-                break;
-            case 0x46:
-                position.set(Position.KEY_INPUT, buf.readUnsignedShortLE());
-                break;
-            case 0x48:
-                position.set("statusExtended", buf.readUnsignedShortLE());
-                break;
-            case 0x58:
-                position.set("rs2320", buf.readUnsignedShortLE());
-                break;
-            case 0x59:
-                position.set("rs2321", buf.readUnsignedShortLE());
-                break;
-            case 0x90:
-                position.set(Position.KEY_DRIVER_UNIQUE_ID, String.valueOf(buf.readUnsignedIntLE()));
-                break;
-            case 0xc0:
-                position.set("fuelTotal", buf.readUnsignedIntLE() * 0.5);
-                break;
-            case 0xc1:
+            }
+            case 0x34 -> position.setAltitude(buf.readShortLE());
+            case 0x35 -> position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
+            case 0x40 -> position.set(Position.KEY_STATUS, buf.readUnsignedShortLE());
+            case 0x41 -> position.set(Position.KEY_POWER, buf.readUnsignedShortLE() / 1000.0);
+            case 0x42 -> position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() / 1000.0);
+            case 0x43 -> position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+            case 0x44 -> position.set(Position.KEY_ACCELERATION, buf.readUnsignedIntLE());
+            case 0x45 -> position.set(Position.KEY_OUTPUT, buf.readUnsignedShortLE());
+            case 0x46 -> position.set(Position.KEY_INPUT, buf.readUnsignedShortLE());
+            case 0x48 -> position.set("statusExtended", buf.readUnsignedShortLE());
+            case 0x58 -> position.set("rs2320", buf.readUnsignedShortLE());
+            case 0x59 -> position.set("rs2321", buf.readUnsignedShortLE());
+            case 0x90 -> position.set(Position.KEY_DRIVER_UNIQUE_ID, String.valueOf(buf.readUnsignedIntLE()));
+            case 0xc0 -> position.set("fuelTotal", buf.readUnsignedIntLE() * 0.5);
+            case 0xc1 -> {
                 position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4);
                 position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedByte() - 40);
                 position.set(Position.KEY_RPM, buf.readUnsignedShortLE() * 0.125);
-                break;
-            case 0xc2:
-                position.set("canB0", buf.readUnsignedIntLE());
-                break;
-            case 0xc3:
-                position.set("canB1", buf.readUnsignedIntLE());
-                break;
-            case 0xd4:
-                position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
-                break;
-            case 0xe0:
-                position.set(Position.KEY_INDEX, buf.readUnsignedIntLE());
-                break;
-            case 0xe1:
-                position.set(Position.KEY_RESULT,
-                        buf.readSlice(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII));
-                break;
-            case 0xea:
-                position.set("userDataArray", ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte())));
-                break;
-            default:
-                buf.skipBytes(getTagLength(tag));
-                break;
+            }
+            case 0xc2 -> position.set("canB0", buf.readUnsignedIntLE());
+            case 0xc3 -> position.set("canB1", buf.readUnsignedIntLE());
+            case 0xd4 -> position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+            case 0xe0 -> position.set(Position.KEY_INDEX, buf.readUnsignedIntLE());
+            case 0xe1 -> position.set(Position.KEY_RESULT,
+                    buf.readSlice(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII));
+            case 0xea -> position.set("userDataArray", ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte())));
+            default -> buf.skipBytes(getTagLength(tag));
         }
     }
 
diff --git a/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java b/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java
index cd068b251..b0033a2ba 100644
--- a/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java
@@ -58,15 +58,13 @@ public class GalileoProtocolEncoder extends BaseProtocolEncoder {
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_CUSTOM:
-                return encodeText(getUniqueId(command.getDeviceId()), command.getString(Command.KEY_DATA));
-            case Command.TYPE_OUTPUT_CONTROL:
-                return encodeText(getUniqueId(command.getDeviceId()),
-                        "Out " + command.getInteger(Command.KEY_INDEX) + "," + command.getString(Command.KEY_DATA));
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_CUSTOM -> encodeText(getUniqueId(command.getDeviceId()),
+                    command.getString(Command.KEY_DATA));
+            case Command.TYPE_OUTPUT_CONTROL -> encodeText(getUniqueId(command.getDeviceId()),
+                    "Out " + command.getInteger(Command.KEY_INDEX) + "," + command.getString(Command.KEY_DATA));
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/GatorProtocolEncoder.java b/src/main/java/org/traccar/protocol/GatorProtocolEncoder.java
index 6c6b9a54a..2bd56592b 100644
--- a/src/main/java/org/traccar/protocol/GatorProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/GatorProtocolEncoder.java
@@ -73,21 +73,22 @@ public class GatorProtocolEncoder extends BaseProtocolEncoder {
 
         ByteBuf content = Unpooled.buffer();
 
-        switch (command.getType()) {
-            case Command.TYPE_POSITION_SINGLE:
-                return encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_POSITION_REQUEST, null);
-            case Command.TYPE_ENGINE_STOP:
-                return encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_CLOSE_OIL_DUCT, null);
-            case Command.TYPE_ENGINE_RESUME:
-                return encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_RESTORE_OIL_DUCT, null);
-            case Command.TYPE_SET_SPEED_LIMIT:
+        return switch (command.getType()) {
+            case Command.TYPE_POSITION_SINGLE ->
+                    encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_POSITION_REQUEST, null);
+            case Command.TYPE_ENGINE_STOP ->
+                    encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_CLOSE_OIL_DUCT, null);
+            case Command.TYPE_ENGINE_RESUME ->
+                    encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_RESTORE_OIL_DUCT, null);
+            case Command.TYPE_SET_SPEED_LIMIT -> {
                 content.writeByte(command.getInteger(Command.KEY_DATA));
-                return encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_RESET_MILEAGE, content);
-            case Command.TYPE_SET_ODOMETER:
+                yield encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_RESET_MILEAGE, content);
+            }
+            case Command.TYPE_SET_ODOMETER -> {
                 content.writeShort(command.getInteger(Command.KEY_DATA));
-                return encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_OVERSPEED_ALARM, content);
-            default:
-                return null;
-        }
+                yield encodeContent(command.getDeviceId(), GatorProtocolDecoder.MSG_OVERSPEED_ALARM, content);
+            }
+            default -> null;
+        };
     }
 }
diff --git a/src/main/java/org/traccar/protocol/GenxProtocolDecoder.java b/src/main/java/org/traccar/protocol/GenxProtocolDecoder.java
index 6448b6a5a..30416a07b 100644
--- a/src/main/java/org/traccar/protocol/GenxProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/GenxProtocolDecoder.java
@@ -57,42 +57,21 @@ public class GenxProtocolDecoder extends BaseProtocolDecoder {
 
         for (int i = 0; i < Math.min(values.length, reportColumns.length); i++) {
             switch (reportColumns[i]) {
-                case 1:
-                case 28:
+                case 1, 28 -> {
                     DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[i]);
                     if (deviceSession != null) {
                         position.setDeviceId(deviceSession.getDeviceId());
                     }
-                    break;
-                case 2:
-                    position.setTime(new SimpleDateFormat("MM/dd/yy HH:mm:ss").parse(values[i]));
-                    break;
-                case 3:
-                    position.setLatitude(Double.parseDouble(values[i]));
-                    break;
-                case 4:
-                    position.setLongitude(Double.parseDouble(values[i]));
-                    break;
-                case 11:
-                    position.set(Position.KEY_IGNITION, values[i].equals("ON"));
-                    break;
-                case 13:
-                    position.setSpeed(UnitsConverter.knotsFromKph(Integer.parseInt(values[i])));
-                    break;
-                case 17:
-                    position.setCourse(Integer.parseInt(values[i]));
-                    break;
-                case 23:
-                    position.set(Position.KEY_ODOMETER, Double.parseDouble(values[i]) * 1000);
-                    break;
-                case 27:
-                    position.setAltitude(UnitsConverter.metersFromFeet(Integer.parseInt(values[i])));
-                    break;
-                case 46:
-                    position.set(Position.KEY_SATELLITES, Integer.parseInt(values[i]));
-                    break;
-                default:
-                    break;
+                }
+                case 2 -> position.setTime(new SimpleDateFormat("MM/dd/yy HH:mm:ss").parse(values[i]));
+                case 3 -> position.setLatitude(Double.parseDouble(values[i]));
+                case 4 -> position.setLongitude(Double.parseDouble(values[i]));
+                case 11 -> position.set(Position.KEY_IGNITION, values[i].equals("ON"));
+                case 13 -> position.setSpeed(UnitsConverter.knotsFromKph(Integer.parseInt(values[i])));
+                case 17 -> position.setCourse(Integer.parseInt(values[i]));
+                case 23 -> position.set(Position.KEY_ODOMETER, Double.parseDouble(values[i]) * 1000);
+                case 27 -> position.setAltitude(UnitsConverter.metersFromFeet(Integer.parseInt(values[i])));
+                case 46 -> position.set(Position.KEY_SATELLITES, Integer.parseInt(values[i]));
             }
         }
 
diff --git a/src/main/java/org/traccar/protocol/Gl200BinaryProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
index ecd1f5bfa..359af8e5a 100644
--- a/src/main/java/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
@@ -230,52 +230,39 @@ public class Gl200BinaryProtocolDecoder extends BaseProtocolDecoder {
         position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
 
         switch (type) {
-            case MSG_EVT_BPL:
-                buf.readUnsignedShort(); // backup battery voltage
-                break;
-            case MSG_EVT_VGN:
-            case MSG_EVT_VGF:
+            case MSG_EVT_BPL -> buf.readUnsignedShort(); // backup battery voltage
+            case MSG_EVT_VGN, MSG_EVT_VGF -> {
                 buf.readUnsignedShort(); // reserved
                 buf.readUnsignedByte(); // report type
                 buf.readUnsignedInt(); // ignition duration
-                break;
-            case MSG_EVT_UPD:
+            }
+            case MSG_EVT_UPD -> {
                 buf.readUnsignedShort(); // code
                 buf.readUnsignedByte(); // retry
-                break;
-            case MSG_EVT_IDF:
-                buf.readUnsignedInt(); // idling duration
-                break;
-            case MSG_EVT_GSS:
+            }
+            case MSG_EVT_IDF -> buf.readUnsignedInt(); // idling duration
+            case MSG_EVT_GSS -> {
                 buf.readUnsignedByte(); // gps signal status
                 buf.readUnsignedInt(); // reserved
-                break;
-            case MSG_EVT_GES:
+            }
+            case MSG_EVT_GES -> {
                 buf.readUnsignedShort(); // trigger geo id
                 buf.readUnsignedByte(); // trigger geo enable
                 buf.readUnsignedByte(); // trigger mode
                 buf.readUnsignedInt(); // radius
                 buf.readUnsignedInt(); // check interval
-                break;
-            case MSG_EVT_GPJ:
+            }
+            case MSG_EVT_GPJ -> {
                 buf.readUnsignedByte(); // cw jamming value
                 buf.readUnsignedByte(); // gps jamming state
-                break;
-            case MSG_EVT_RMD:
-                buf.readUnsignedByte(); // roaming state
-                break;
-            case MSG_EVT_JDS:
-                buf.readUnsignedByte(); // jamming state
-                break;
-            case MSG_EVT_CRA:
-                buf.readUnsignedByte(); // crash counter
-                break;
-            case MSG_EVT_UPC:
+            }
+            case MSG_EVT_RMD -> buf.readUnsignedByte(); // roaming state
+            case MSG_EVT_JDS -> buf.readUnsignedByte(); // jamming state
+            case MSG_EVT_CRA -> buf.readUnsignedByte(); // crash counter
+            case MSG_EVT_UPC -> {
                 buf.readUnsignedByte(); // command id
                 buf.readUnsignedShort(); // result
-                break;
-            default:
-                break;
+            }
         }
 
         buf.readUnsignedByte(); // count
@@ -388,16 +375,12 @@ public class Gl200BinaryProtocolDecoder extends BaseProtocolDecoder {
 
         ByteBuf buf = (ByteBuf) msg;
 
-        switch (buf.readSlice(4).toString(StandardCharsets.US_ASCII)) {
-            case "+RSP":
-                return decodeLocation(channel, remoteAddress, buf);
-            case "+INF":
-                return decodeInformation(channel, remoteAddress, buf);
-            case "+EVT":
-                return decodeEvent(channel, remoteAddress, buf);
-            default:
-                return null;
-        }
+        return switch (buf.readSlice(4).toString(StandardCharsets.US_ASCII)) {
+            case "+RSP" -> decodeLocation(channel, remoteAddress, buf);
+            case "+INF" -> decodeInformation(channel, remoteAddress, buf);
+            case "+EVT" -> decodeEvent(channel, remoteAddress, buf);
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/Gl200FrameDecoder.java b/src/main/java/org/traccar/protocol/Gl200FrameDecoder.java
index 4ce243425..b011ede8b 100644
--- a/src/main/java/org/traccar/protocol/Gl200FrameDecoder.java
+++ b/src/main/java/org/traccar/protocol/Gl200FrameDecoder.java
@@ -52,27 +52,13 @@ public class Gl200FrameDecoder extends BaseFrameDecoder {
 
         if (isBinary(buf)) {
 
-            int length;
-            switch (buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII)) {
-                case "+ACK":
-                    length = buf.getUnsignedByte(buf.readerIndex() + 6);
-                    break;
-                case "+INF":
-                case "+BNF":
-                    length = buf.getUnsignedShort(buf.readerIndex() + 7);
-                    break;
-                case "+HBD":
-                    length = buf.getUnsignedByte(buf.readerIndex() + 5);
-                    break;
-                case "+CRD":
-                case "+BRD":
-                case "+LGN":
-                    length = buf.getUnsignedShort(buf.readerIndex() + 6);
-                    break;
-                default:
-                    length = buf.getUnsignedShort(buf.readerIndex() + 9);
-                    break;
-            }
+            int length = switch (buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII)) {
+                case "+ACK" -> buf.getUnsignedByte(buf.readerIndex() + 6);
+                case "+INF", "+BNF" -> buf.getUnsignedShort(buf.readerIndex() + 7);
+                case "+HBD" -> buf.getUnsignedByte(buf.readerIndex() + 5);
+                case "+CRD", "+BRD", "+LGN" -> buf.getUnsignedShort(buf.readerIndex() + 6);
+                default -> buf.getUnsignedShort(buf.readerIndex() + 9);
+            };
 
             if (buf.readableBytes() >= length) {
                 return buf.readRetainedSlice(length);
diff --git a/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java
index dd0672c23..1d48db623 100644
--- a/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java
@@ -30,22 +30,19 @@ public class Gl200ProtocolEncoder extends StringProtocolEncoder {
 
         initDevicePassword(command, "");
 
-        switch (command.getType()) {
-            case Command.TYPE_POSITION_SINGLE:
-                return formatCommand(command, "AT+GTRTO=%s,1,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
-            case Command.TYPE_ENGINE_STOP:
-                return formatCommand(command, "AT+GTOUT=%s,1,,,0,0,0,0,0,0,0,,,,,,,FFFF$",
-                        Command.KEY_DEVICE_PASSWORD);
-            case Command.TYPE_ENGINE_RESUME:
-                return formatCommand(command, "AT+GTOUT=%s,0,,,0,0,0,0,0,0,0,,,,,,,FFFF$",
-                        Command.KEY_DEVICE_PASSWORD);
-            case Command.TYPE_IDENTIFICATION:
-                return formatCommand(command, "AT+GTRTO=%s,8,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
-            case Command.TYPE_REBOOT_DEVICE:
-                return formatCommand(command, "AT+GTRTO=%s,3,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_POSITION_SINGLE -> formatCommand(
+                    command, "AT+GTRTO=%s,1,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_ENGINE_STOP -> formatCommand(
+                    command, "AT+GTOUT=%s,1,,,0,0,0,0,0,0,0,,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_ENGINE_RESUME -> formatCommand(
+                    command, "AT+GTOUT=%s,0,,,0,0,0,0,0,0,0,,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_IDENTIFICATION -> formatCommand(
+                    command, "AT+GTRTO=%s,8,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_REBOOT_DEVICE -> formatCommand(
+                    command, "AT+GTRTO=%s,3,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/Gl200TextProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gl200TextProtocolDecoder.java
index 373e1c91c..edcd0fa8b 100644
--- a/src/main/java/org/traccar/protocol/Gl200TextProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/Gl200TextProtocolDecoder.java
@@ -229,32 +229,24 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         position.setDeviceId(deviceSession.getDeviceId());
 
         switch (parser.nextHexInt()) {
-            case 0x16:
-            case 0x1A:
-            case 0x12:
+            case 0x16, 0x1A, 0x12 -> {
                 position.set(Position.KEY_IGNITION, false);
                 position.set(Position.KEY_MOTION, true);
-                break;
-            case 0x11:
+            }
+            case 0x11 -> {
                 position.set(Position.KEY_IGNITION, false);
                 position.set(Position.KEY_MOTION, false);
-                break;
-            case 0x21:
+            }
+            case 0x21 -> {
                 position.set(Position.KEY_IGNITION, true);
                 position.set(Position.KEY_MOTION, false);
-                break;
-            case 0x22:
+            }
+            case 0x22 -> {
                 position.set(Position.KEY_IGNITION, true);
                 position.set(Position.KEY_MOTION, true);
-                break;
-            case 0x41:
-                position.set(Position.KEY_MOTION, false);
-                break;
-            case 0x42:
-                position.set(Position.KEY_MOTION, true);
-                break;
-            default:
-                break;
+            }
+            case 0x41 -> position.set(Position.KEY_MOTION, false);
+            case 0x42 -> position.set(Position.KEY_MOTION, true);
         }
 
         position.set(Position.KEY_ICCID, parser.next());
@@ -1495,19 +1487,9 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.KEY_IGNITION, reportType % 0x10 == 1);
         } else if (type.equals("HBM")) {
             switch (reportType % 0x10) {
-                case 0:
-                case 3:
-                    position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
-                    break;
-                case 1:
-                case 4:
-                    position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
-                    break;
-                case 2:
-                    position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
-                    break;
-                default:
-                    break;
+                case 0, 3 -> position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                case 1, 4 -> position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                case 2 -> position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
             }
         }
 
@@ -1595,45 +1577,17 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         decodeDeviceTime(position, parser);
 
         switch (type) {
-            case "TOW":
-                position.set(Position.KEY_ALARM, Position.ALARM_TOW);
-                break;
-            case "IDL":
-                position.set(Position.KEY_ALARM, Position.ALARM_IDLE);
-                break;
-            case "PNA":
-                position.set(Position.KEY_ALARM, Position.ALARM_POWER_ON);
-                break;
-            case "PFA":
-                position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
-                break;
-            case "EPN":
-            case "MPN":
-                position.set(Position.KEY_ALARM, Position.ALARM_POWER_RESTORED);
-                break;
-            case "EPF":
-            case "MPF":
-                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
-                break;
-            case "BPL":
-                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
-                break;
-            case "STT":
-                position.set(Position.KEY_ALARM, Position.ALARM_MOVEMENT);
-                break;
-            case "SWG":
-                position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE);
-                break;
-            case "TMP":
-            case "TEM":
-                position.set(Position.KEY_ALARM, Position.ALARM_TEMPERATURE);
-                break;
-            case "JDR":
-            case "JDS":
-                position.set(Position.KEY_ALARM, Position.ALARM_JAMMING);
-                break;
-            default:
-                break;
+            case "TOW" -> position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+            case "IDL" -> position.set(Position.KEY_ALARM, Position.ALARM_IDLE);
+            case "PNA" -> position.set(Position.KEY_ALARM, Position.ALARM_POWER_ON);
+            case "PFA" -> position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
+            case "EPN", "MPN" -> position.set(Position.KEY_ALARM, Position.ALARM_POWER_RESTORED);
+            case "EPF", "MPF" -> position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+            case "BPL" -> position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+            case "STT" -> position.set(Position.KEY_ALARM, Position.ALARM_MOVEMENT);
+            case "SWG" -> position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE);
+            case "TMP", "TEM" -> position.set(Position.KEY_ALARM, Position.ALARM_TEMPERATURE);
+            case "JDR", "JDS" -> position.set(Position.KEY_ALARM, Position.ALARM_JAMMING);
         }
 
         return position;
@@ -1657,72 +1611,26 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         if (sentence.startsWith("+ACK")) {
             result = decodeAck(channel, remoteAddress, values);
         } else {
-            switch (type) {
-                case "INF":
-                    result = decodeInf(channel, remoteAddress, sentence);
-                    break;
-                case "OBD":
-                    result = decodeObd(channel, remoteAddress, sentence);
-                    break;
-                case "CAN":
-                    result = decodeCan(channel, remoteAddress, values);
-                    break;
-                case "CTN":
-                case "FRI":
-                case "GEO":
-                case "RTL":
-                case "DOG":
-                case "STR":
-                    result = decodeFri(channel, remoteAddress, sentence);
-                    break;
-                case "ERI":
-                    result = decodeEri(channel, remoteAddress, values);
-                    break;
-                case "IGN":
-                case "IGF":
-                case "VGN":
-                case "VGF":
-                    result = decodeIgn(channel, remoteAddress, values, type);
-                    break;
-                case "LSW":
-                case "TSW":
-                    result = decodeLsw(channel, remoteAddress, sentence);
-                    break;
-                case "IDA":
-                    result = decodeIda(channel, remoteAddress, sentence);
-                    break;
-                case "WIF":
-                    result = decodeWif(channel, remoteAddress, sentence);
-                    break;
-                case "GSM":
-                    result = decodeGsm(channel, remoteAddress, sentence);
-                    break;
-                case "VER":
-                    result = decodeVer(channel, remoteAddress, sentence);
-                    break;
-                case "PNA":
-                case "PFA":
-                    result = decodePna(channel, remoteAddress, sentence);
-                    break;
-                case "DAR":
-                    result = decodeDar(channel, remoteAddress, sentence);
-                    break;
-                case "DTT":
-                    result = decodeDtt(channel, remoteAddress, sentence);
-                    break;
-                case "BAA":
-                    result = decodeBaa(channel, remoteAddress, sentence);
-                    break;
-                case "BID":
-                    result = decodeBid(channel, remoteAddress, sentence);
-                    break;
-                case "LSA":
-                    result = decodeLsa(channel, remoteAddress, sentence);
-                    break;
-                default:
-                    result = decodeOther(channel, remoteAddress, sentence, type);
-                    break;
-            }
+            result = switch (type) {
+                case "INF" -> decodeInf(channel, remoteAddress, sentence);
+                case "OBD" -> decodeObd(channel, remoteAddress, sentence);
+                case "CAN" -> decodeCan(channel, remoteAddress, values);
+                case "CTN", "FRI", "GEO", "RTL", "DOG", "STR" -> decodeFri(channel, remoteAddress, sentence);
+                case "ERI" -> decodeEri(channel, remoteAddress, values);
+                case "IGN", "IGF", "VGN", "VGF" -> decodeIgn(channel, remoteAddress, values, type);
+                case "LSW", "TSW" -> decodeLsw(channel, remoteAddress, sentence);
+                case "IDA" -> decodeIda(channel, remoteAddress, sentence);
+                case "WIF" -> decodeWif(channel, remoteAddress, sentence);
+                case "GSM" -> decodeGsm(channel, remoteAddress, sentence);
+                case "VER" -> decodeVer(channel, remoteAddress, sentence);
+                case "PNA", "PFA" -> decodePna(channel, remoteAddress, sentence);
+                case "DAR" -> decodeDar(channel, remoteAddress, sentence);
+                case "DTT" -> decodeDtt(channel, remoteAddress, sentence);
+                case "BAA" -> decodeBaa(channel, remoteAddress, sentence);
+                case "BID" -> decodeBid(channel, remoteAddress, sentence);
+                case "LSA" -> decodeLsa(channel, remoteAddress, sentence);
+                default -> decodeOther(channel, remoteAddress, sentence, type);
+            };
 
             if (result == null) {
                 result = decodeBasic(channel, remoteAddress, sentence, type);
diff --git a/src/main/java/org/traccar/protocol/GlobalSatProtocolEncoder.java b/src/main/java/org/traccar/protocol/GlobalSatProtocolEncoder.java
index 4f56274da..c39410371 100644
--- a/src/main/java/org/traccar/protocol/GlobalSatProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/GlobalSatProtocolEncoder.java
@@ -32,20 +32,12 @@ public class GlobalSatProtocolEncoder extends StringProtocolEncoder {
         String formattedCommand = null;
 
         switch (command.getType()) {
-            case Command.TYPE_CUSTOM:
-                formattedCommand = formatCommand(
-                        command, "GSC,%s,%s", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
-                break;
-            case Command.TYPE_ALARM_DISMISS:
-                formattedCommand = formatCommand(
-                        command, "GSC,%s,Na", Command.KEY_UNIQUE_ID);
-                break;
-            case Command.TYPE_OUTPUT_CONTROL:
-                formattedCommand = formatCommand(
-                        command, "GSC,%s,Lo(%s,%s)", Command.KEY_UNIQUE_ID, Command.KEY_INDEX, Command.KEY_DATA);
-                break;
-            default:
-                break;
+            case Command.TYPE_CUSTOM -> formattedCommand = formatCommand(
+                    command, "GSC,%s,%s", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
+            case Command.TYPE_ALARM_DISMISS -> formattedCommand = formatCommand(
+                    command, "GSC,%s,Na", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_OUTPUT_CONTROL -> formattedCommand = formatCommand(
+                    command, "GSC,%s,Lo(%s,%s)", Command.KEY_UNIQUE_ID, Command.KEY_INDEX, Command.KEY_DATA);
         }
 
         if (formattedCommand != null) {
diff --git a/src/main/java/org/traccar/protocol/Gps103ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gps103ProtocolDecoder.java
index d1c35b478..554a23915 100644
--- a/src/main/java/org/traccar/protocol/Gps103ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/Gps103ProtocolDecoder.java
@@ -141,35 +141,21 @@ public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
         } else if (value.startsWith("oil")) {
             return Position.ALARM_FUEL_LEAK;
         }
-        switch (value) {
-            case "help me":
-                return Position.ALARM_SOS;
-            case "low battery":
-                return Position.ALARM_LOW_BATTERY;
-            case "stockade":
-                return Position.ALARM_GEOFENCE;
-            case "move":
-                return Position.ALARM_MOVEMENT;
-            case "speed":
-                return Position.ALARM_OVERSPEED;
-            case "door alarm":
-                return Position.ALARM_DOOR;
-            case "ac alarm":
-                return Position.ALARM_POWER_CUT;
-            case "accident alarm":
-                return Position.ALARM_ACCIDENT;
-            case "sensor alarm":
-                return Position.ALARM_VIBRATION;
-            case "bonnet alarm":
-                return Position.ALARM_BONNET;
-            case "footbrake alarm":
-                return Position.ALARM_FOOT_BRAKE;
-            case "DTC":
-                return Position.ALARM_FAULT;
-            case "tracker":
-            default:
-                return null;
-        }
+        return switch (value) {
+            case "help me" -> Position.ALARM_SOS;
+            case "low battery" -> Position.ALARM_LOW_BATTERY;
+            case "stockade" -> Position.ALARM_GEOFENCE;
+            case "move" -> Position.ALARM_MOVEMENT;
+            case "speed" -> Position.ALARM_OVERSPEED;
+            case "door alarm" -> Position.ALARM_DOOR;
+            case "ac alarm" -> Position.ALARM_POWER_CUT;
+            case "accident alarm" -> Position.ALARM_ACCIDENT;
+            case "sensor alarm" -> Position.ALARM_VIBRATION;
+            case "bonnet alarm" -> Position.ALARM_BONNET;
+            case "footbrake alarm" -> Position.ALARM_FOOT_BRAKE;
+            case "DTC" -> Position.ALARM_FAULT;
+            default -> null;
+        };
     }
 
     private Position decodeRegular(Channel channel, SocketAddress remoteAddress, String sentence) {
diff --git a/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java
index 9a899eeeb..1af99d647 100644
--- a/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java
@@ -45,29 +45,27 @@ public class Gps103ProtocolEncoder extends StringProtocolEncoder implements Stri
     @Override
     protected Object encodeCommand(Command command) {
 
-        switch (command.getType()) {
-            case Command.TYPE_CUSTOM:
-                return formatCommand(command, "**,imei:%s,%s", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
-            case Command.TYPE_POSITION_STOP:
-                return formatCommand(command, "**,imei:%s,D", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_POSITION_SINGLE:
-                return formatCommand(command, "**,imei:%s,B", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_POSITION_PERIODIC:
-                return formatCommand(
-                        command, "**,imei:%s,C,%s", this, Command.KEY_UNIQUE_ID, Command.KEY_FREQUENCY);
-            case Command.TYPE_ENGINE_STOP:
-                return formatCommand(command, "**,imei:%s,J", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_ENGINE_RESUME:
-                return formatCommand(command, "**,imei:%s,K", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_ALARM_ARM:
-                return formatCommand(command, "**,imei:%s,L", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_ALARM_DISARM:
-                return formatCommand(command, "**,imei:%s,M", Command.KEY_UNIQUE_ID);
-            case Command.TYPE_REQUEST_PHOTO:
-                return formatCommand(command, "**,imei:%s,160", Command.KEY_UNIQUE_ID);
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_CUSTOM -> formatCommand(
+                    command, "**,imei:%s,%s", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
+            case Command.TYPE_POSITION_STOP -> formatCommand(
+                    command, "**,imei:%s,D", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_POSITION_SINGLE -> formatCommand(
+                    command, "**,imei:%s,B", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_POSITION_PERIODIC -> formatCommand(
+                    command, "**,imei:%s,C,%s", this, Command.KEY_UNIQUE_ID, Command.KEY_FREQUENCY);
+            case Command.TYPE_ENGINE_STOP -> formatCommand(
+                    command, "**,imei:%s,J", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ENGINE_RESUME -> formatCommand(
+                    command, "**,imei:%s,K", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_ARM -> formatCommand(
+                    command, "**,imei:%s,L", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_DISARM -> formatCommand(
+                    command, "**,imei:%s,M", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_REQUEST_PHOTO -> formatCommand(
+                    command, "**,imei:%s,160", Command.KEY_UNIQUE_ID);
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java b/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java
index 66c2a4973..a171e2b6a 100644
--- a/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java
@@ -38,16 +38,12 @@ public class GranitProtocolEncoder extends BaseProtocolEncoder {
 
     @Override
     protected Object encodeCommand(Command command) {
-        switch (command.getType()) {
-            case Command.TYPE_IDENTIFICATION:
-                return encodeCommand("BB+IDNT");
-            case Command.TYPE_REBOOT_DEVICE:
-                return encodeCommand("BB+RESET");
-            case Command.TYPE_POSITION_SINGLE:
-                return encodeCommand("BB+RRCD");
-            default:
-                return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_IDENTIFICATION -> encodeCommand("BB+IDNT");
+            case Command.TYPE_REBOOT_DEVICE -> encodeCommand("BB+RESET");
+            case Command.TYPE_POSITION_SINGLE -> encodeCommand("BB+RRCD");
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java b/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java
index be0ab5130..6b8ef0969 100644
--- a/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java
+++ b/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java
@@ -28,14 +28,11 @@ public class GranitProtocolSmsEncoder extends StringProtocolEncoder {
 
     @Override
     protected String encodeCommand(Command command) {
-        switch (command.getType()) {
-        case Command.TYPE_REBOOT_DEVICE:
-            return "BB+RESET";
-        case Command.TYPE_POSITION_PERIODIC:
-            return formatCommand(command, "BB+BBMD=%s", Command.KEY_FREQUENCY);
-        default:
-            return null;
-        }
+        return switch (command.getType()) {
+            case Command.TYPE_REBOOT_DEVICE -> "BB+RESET";
+            case Command.TYPE_POSITION_PERIODIC -> formatCommand(command, "BB+BBMD=%s", Command.KEY_FREQUENCY);
+            default -> null;
+        };
     }
 
 }
diff --git a/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java
index 1d77f75d7..f17671cd7 100644
--- a/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java
@@ -421,54 +421,27 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
     private String decodeAlarm(short value, String model) {
         boolean modelLW = model != null && model.toUpperCase().startsWith("LW");
-        switch (value) {
-            case 0x01:
-                return Position.ALARM_SOS;
-            case 0x02:
-                return Position.ALARM_POWER_CUT;
-            case 0x03:
-            case 0x09:
-                return Position.ALARM_VIBRATION;
-            case 0x04:
-                return Position.ALARM_GEOFENCE_ENTER;
-            case 0x05:
-                return Position.ALARM_GEOFENCE_EXIT;
-            case 0x06:
-                return Position.ALARM_OVERSPEED;
-            case 0x0E:
-            case 0x0F:
-                return Position.ALARM_LOW_BATTERY;
-            case 0x11:
-                return Position.ALARM_POWER_OFF;
-            case 0x0C:
-            case 0x13:
-            case 0x25:
-                return Position.ALARM_TAMPERING;
-            case 0x14:
-                return Position.ALARM_DOOR;
-            case 0x18:
-                return modelLW ? Position.ALARM_ACCIDENT : Position.ALARM_REMOVING;
-            case 0x19:
-                return modelLW ? Position.ALARM_ACCELERATION : Position.ALARM_LOW_BATTERY;
-            case 0x1A:
-            case 0x28:
-                return Position.ALARM_BRAKING;
-            case 0x1B:
-            case 0x2A:
-            case 0x2B:
-            case 0x2E:
-                return Position.ALARM_CORNERING;
-            case 0x23:
-                return Position.ALARM_FALL_DOWN;
-            case 0x29:
-                return Position.ALARM_ACCELERATION;
-            case 0x2C:
-                return Position.ALARM_ACCIDENT;
-            case 0x30:
-                return Position.ALARM_JAMMING;
-            default:
-                return null;
-        }
+        return switch (value) {
+            case 0x01 -> Position.ALARM_SOS;
+            case 0x02 -> Position.ALARM_POWER_CUT;
+            case 0x03, 0x09 -> Position.ALARM_VIBRATION;
+            case 0x04 -> Position.ALARM_GEOFENCE_ENTER;
+            case 0x05 -> Position.ALARM_GEOFENCE_EXIT;
+            case 0x06 -> Position.ALARM_OVERSPEED;
+            case 0x0E, 0x0F -> Position.ALARM_LOW_BATTERY;
+            case 0x11 -> Position.ALARM_POWER_OFF;
+            case 0x0C, 0x13, 0x25 -> Position.ALARM_TAMPERING;
+            case 0x14 -> Position.ALARM_DOOR;
+            case 0x18 -> modelLW ? Position.ALARM_ACCIDENT : Position.ALARM_REMOVING;
+            case 0x19 -> modelLW ? Position.ALARM_ACCELERATION : Position.ALARM_LOW_BATTERY;
+            case 0x1A, 0x28 -> Position.ALARM_BRAKING;
+            case 0x1B, 0x2A, 0x2B, 0x2E -> Position.ALARM_CORNERING;
+            case 0x23 -> Position.ALARM_FALL_DOWN;
+            case 0x29 -> Position.ALARM_ACCELERATION;
+            case 0x2C -> Position.ALARM_ACCIDENT;
+            case 0x30 -> Position.ALARM_JAMMING;
+            default -> null;
+        };
     }
 
     private Object decodeBasic(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
@@ -968,18 +941,10 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
                 int module = buf.readUnsignedShort();
                 int subLength = buf.readUnsignedByte();
                 switch (module) {
-                    case 0x0027:
-                        position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
-                        break;
-                    case 0x002E:
-                        position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
-                        break;
-                    case 0x003B:
-                        position.setAccuracy(buf.readUnsignedShort() * 0.01);
-                        break;
-                    default:
-                        buf.skipBytes(subLength);
-                        break;
+                    case 0x0027 -> position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
+                    case 0x002E -> position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+                    case 0x003B -> position.setAccuracy(buf.readUnsignedShort() * 0.01);
+                    default -> buf.skipBytes(subLength);
                 }
             }
 
@@ -1022,38 +987,17 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             short event = buf.readUnsignedByte();
             position.set(Position.KEY_EVENT, event);
             switch (event) {
-                case 0x01:
-                    position.set(Position.KEY_ALARM, extendedAlarm ? Position.ALARM_SOS : Position.ALARM_GENERAL);
-                    break;
-                case 0x0E:
-                    position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
-                    break;
-                case 0x76:
-                    position.set(Position.KEY_ALARM, Position.ALARM_TEMPERATURE);
-                    break;
-                case 0x80:
-                    position.set(Position.KEY_ALARM, Position.ALARM_VIBRATION);
-                    break;
-                case 0x87:
-                    position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
-                    break;
-                case 0x88:
-                    position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
-                    break;
-                case 0x90:
-                    position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
-                    break;
-                case 0x91:
-                    position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
-                    break;
-                case 0x92:
-                    position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
-                    break;
-                case 0x93:
-                    position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
-                    break;
-                default:
-                    break;
+                case 0x01 -> position.set(
+                        Position.KEY_ALARM, extendedAlarm ? Position.ALARM_SOS : Position.ALARM_GENERAL);
+                case 0x0E -> position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+                case 0x76 -> position.set(Position.KEY_ALARM, Position.ALARM_TEMPERATURE);
+                case 0x80 -> position.set(Position.KEY_ALARM, Position.ALARM_VIBRATION);
+                case 0x87 -> position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                case 0x88 -> position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                case 0x90 -> position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                case 0x91 -> position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                case 0x92 -> position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                case 0x93 -> position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
             }
 
         } else {
@@ -1251,24 +1195,11 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
             if (type == MSG_AZ735_ALARM) {
                 switch (status) {
-                    case 0xA0:
-                        position.set(Position.KEY_ARMED, true);
-                        break;
-                    case 0xA1:
-                        position.set(Position.KEY_ARMED, false);
-                        break;
-                    case 0xA2:
-                    case 0xA3:
-                        position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
-                        break;
-                    case 0xA4:
-                        position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
-                        break;
-                    case 0xA5:
-                        position.set(Position.KEY_ALARM, Position.ALARM_DOOR);
-                        break;
-                    default:
-                        break;
+                    case 0xA0 -> position.set(Position.KEY_ARMED, true);
+                    case 0xA1 -> position.set(Position.KEY_ARMED, false);
+                    case 0xA2, 0xA3 -> position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                    case 0xA4 -> position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+                    case 0xA5 -> position.set(Position.KEY_ALARM, Position.ALARM_DOOR);
                 }
             }
 
@@ -1293,32 +1224,14 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
                 String[] values = pair.split("=");
                 if (values.length >= 2) {
                     switch (Integer.parseInt(values[0].substring(0, 2), 16)) {
-                        case 40:
-                            position.set(Position.KEY_ODOMETER, Integer.parseInt(values[1], 16) * 0.01);
-                            break;
-                        case 43:
-                            position.set(Position.KEY_FUEL_LEVEL, Integer.parseInt(values[1], 16) * 0.01);
-                            break;
-                        case 45:
-                            position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(values[1], 16) * 0.01);
-                            break;
-                        case 53:
-                            position.set(Position.KEY_OBD_SPEED, Integer.parseInt(values[1], 16) * 0.01);
-                            break;
-                        case 54:
-                            position.set(Position.KEY_RPM, Integer.parseInt(values[1], 16) * 0.01);
-                            break;
-                        case 71:
-                            position.set(Position.KEY_FUEL_USED, Integer.parseInt(values[1], 16) * 0.01);
-                            break;
-                        case 73:
-                            position.set(Position.KEY_HOURS, Integer.parseInt(values[1], 16) * 0.01);
-                            break;
-                        case 74:
-                            position.set(Position.KEY_VIN, values[1]);
-                            break;
-                        default:
-                            break;
+                        case 40 -> position.set(Position.KEY_ODOMETER, Integer.parseInt(values[1], 16) * 0.01);
+                        case 43 -> position.set(Position.KEY_FUEL_LEVEL, Integer.parseInt(values[1], 16) * 0.01);
+                        case 45 -> position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(values[1], 16) * 0.01);
+                        case 53 -> position.set(Position.KEY_OBD_SPEED, Integer.parseInt(values[1], 16) * 0.01);
+                        case 54 -> position.set(Position.KEY_RPM, Integer.parseInt(values[1], 16) * 0.01);
+                        case 71 -> position.set(Position.KEY_FUEL_USED, Integer.parseInt(values[1], 16) * 0.01);
+                        case 73 -> position.set(Position.KEY_HOURS, Integer.parseInt(values[1], 16) * 0.01);
+                        case 74 -> position.set(Position.KEY_VIN, values[1]);
                     }
                 }
             }
@@ -1332,16 +1245,10 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
                 int moduleLength = buf.readUnsignedShort();
 
                 switch (moduleType) {
-                    case 0x03:
-                        position.set(Position.KEY_ICCID, ByteBufUtil.hexDump(buf.readSlice(10)));
-                        break;
-                    case 0x09:
-                        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
-                        break;
-                    case 0x0a:
-                        position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedByte());
-                        break;
-                    case 0x11:
+                    case 0x03 -> position.set(Position.KEY_ICCID, ByteBufUtil.hexDump(buf.readSlice(10)));
+                    case 0x09 -> position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                    case 0x0a -> position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedByte());
+                    case 0x11 -> {
                         CellTower cellTower = CellTower.from(
                                 buf.readUnsignedShort(),
                                 buf.readUnsignedShort(),
@@ -1351,22 +1258,16 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
                         if (cellTower.getCellId() > 0) {
                             position.setNetwork(new Network(cellTower));
                         }
-                        break;
-                    case 0x18:
-                        position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
-                        break;
-                    case 0x28:
-                        position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
-                        break;
-                    case 0x29:
-                        position.set(Position.KEY_INDEX, buf.readUnsignedInt());
-                        break;
-                    case 0x2a:
+                    }
+                    case 0x18 -> position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
+                    case 0x28 -> position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
+                    case 0x29 -> position.set(Position.KEY_INDEX, buf.readUnsignedInt());
+                    case 0x2a -> {
                         int input = buf.readUnsignedByte();
                         position.set(Position.KEY_DOOR, BitUtil.to(input, 4) > 0);
                         position.set("tamper", BitUtil.from(input, 4) > 0);
-                        break;
-                    case 0x2b:
+                    }
+                    case 0x2b -> {
                         int event = buf.readUnsignedByte();
                         switch (event) {
                             case 0x11:
@@ -1385,11 +1286,9 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
                                 break;
                         }
                         position.set(Position.KEY_EVENT, event);
-                        break;
-                    case 0x2e:
-                        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
-                        break;
-                    case 0x33:
+                    }
+                    case 0x2e -> position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+                    case 0x33 -> {
                         position.setTime(new Date(buf.readUnsignedInt() * 1000));
                         position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
                         position.setAltitude(buf.readShort());
@@ -1411,15 +1310,13 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
                         position.setLatitude(latitude);
                         position.setLongitude(longitude);
-                        break;
-                    case 0x34:
+                    }
+                    case 0x34 -> {
                         position.set(Position.KEY_EVENT, buf.readUnsignedByte());
                         buf.readUnsignedIntLE(); // time
                         buf.skipBytes(buf.readUnsignedByte()); // content
-                        break;
-                    default:
-                        buf.skipBytes(moduleLength);
-                        break;
+                    }
+                    default -> buf.skipBytes(moduleLength);
                 }
             }
 
diff --git a/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java
index fb3a2b8ae..b02285f69 100644
--- a/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java
@@ -55,20 +55,13 @@ public class Gt30ProtocolDecoder extends BaseProtocolDecoder {
             .compile();
 
     private String decodeAlarm(int value) {
-        switch (value) {
-            case 0x01:
-            case 0x02:
-            case 0x03:
-                return Position.ALARM_SOS;
-            case 0x10:
-                return Position.ALARM_LOW_BATTERY;
-            case 0x11:
-                return Position.ALARM_OVERSPEED;
-            case 0x12:
-                return Position.ALARM_GEOFENCE;
-            default:
-                return null;
-        }
+        return switch (value) {
+            case 0x01, 0x02, 0x03 -> Position.ALARM_SOS;
+            case 0x10 -> Position.ALARM_LOW_BATTERY;
+            case 0x11 -> Position.ALARM_OVERSPEED;
+            case 0x12 -> Position.ALARM_GEOFENCE;
+            default -> null;
+        };
     }
 
     @Override
diff --git a/src/main/java/org/traccar/protocol/H02ProtocolDecoder.java b/src/main/java/org/traccar/protocol/H02ProtocolDecoder.java
index 2ad4f644b..38c063b52 100644
--- a/src/main/java/org/traccar/protocol/H02ProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/H02ProtocolDecoder.java
@@ -598,7 +598,7 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
         String marker = buf.toString(0, 1, StandardCharsets.US_ASCII);
 
         switch (marker) {
-            case "*":
+            case "*" -> {
                 String sentence = buf.toString(StandardCharsets.US_ASCII).trim();
                 int typeStart = sentence.indexOf(',', sentence.indexOf(',') + 1) + 1;
                 int typeEnd = sentence.indexOf(',', typeStart);
@@ -607,33 +607,30 @@ public class H02ProtocolDecoder extends BaseProtocolDecoder {
                 }
                 if (typeEnd > 0) {
                     String type = sentence.substring(typeStart, typeEnd);
-                    switch (type) {
-                        case "V0":
-                        case "HTBT":
+                    return switch (type) {
+                        case "V0", "HTBT" -> {
                             if (channel != null) {
                                 String response = sentence.substring(0, typeEnd) + "#";
                                 channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
                             }
-                            return decodeHeartbeat(sentence, channel, remoteAddress);
-                        case "NBR":
-                            return decodeLbs(sentence, channel, remoteAddress);
-                        case "LINK":
-                            return decodeLink(sentence, channel, remoteAddress);
-                        case "V3":
-                            return decodeV3(sentence, channel, remoteAddress);
-                        case "VP1":
-                            return decodeVp1(sentence, channel, remoteAddress);
-                        default:
-                            return decodeText(sentence, channel, remoteAddress);
-                    }
+                            yield decodeHeartbeat(sentence, channel, remoteAddress);
+                        }
+                        case "NBR" -> decodeLbs(sentence, channel, remoteAddress);
+                        case "LINK" -> decodeLink(sentence, channel, remoteAddress);
+                        case "V3" -> decodeV3(sentence, channel, remoteAddress);
+                        case "VP1" -> decodeVp1(sentence, channel, remoteAddress);
+                        default -> decodeText(sentence, channel, remoteAddress);
+                    };
                 } else {
                     return null;
                 }
-            case "$":
+            }
+            case "$" -> {
                 return decodeBinary(buf, channel, remoteAddress);
-            case "X":
-            default:
+            }
+            default -> {
                 return null;
+            }
         }
     }
 
diff --git a/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java b/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java
index 86b8c80d4..8a0d232a0 100644
--- a/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java
+++ b/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java
@@ -49,27 +49,23 @@ public class H02ProtocolEncoder extends StringProtocolEncoder {
     protected Object encodeCommand(Command command, Date time) {
         String uniqueId = getUniqueId(command.getDeviceId());
 
-        switch (command.getType()) {
-            case Command.TYPE_ALARM_ARM:
-                return formatCommand(time, uniqueId, "SCF", "0", "0");
-            case Command.TYPE_ALARM_DISARM:
-                return formatCommand(time, uniqueId, "SCF", "1", "1");
-            case Command.TYPE_ENGINE_STOP:
-                return formatCommand(time, uniqueId, "S20", "1", "1");
-            case Command.TYPE_ENGINE_RESUME:
-                return formatCommand(time, uniqueId, "S20", "1", "0");
-            case Command.TYPE_POSITION_PERIODIC:
+        return switch (command.getType()) {
+            case Command.TYPE_ALARM_ARM -> formatCommand(time, uniqueId, "SCF", "0", "0");
+            case Command.TYPE_ALARM_DISARM -> formatCommand(time, uniqueId, "SCF", "1", "1");
+            case Command.TYPE_ENGINE_STOP -> formatCommand(time, uniqueId, "S20", "1", "1");
+            case Command.TYPE_ENGINE_RESUME -> formatCommand(time, uniqueId, "S20", "1", "0");
+            case Command.TYPE_POSITION_PERIODIC -> {
                 String frequency = command.getAttributes().get(Command.KEY_FREQUENCY).toString();
                 if (AttributeUtil.lookup(
                         getCacheManager(), Keys.PROTOCOL_ALTERNATIVE.withPrefix(getProtocolName()),
                         command.getDeviceId())) {
-                    return formatCommand(time, uniqueId, "D1", frequency);
+                    yield formatCommand(time, uniqueId, "D1", frequency);
                 } else {
-                    return formatCommand(time, uniqueId, "S71", "22", frequency);
+                    yield formatCommand(time, uniqueId, "S71", "22", frequency);
                 }
-            default:
-                return null;
-        }
+            }
+            default -> null;
+        };
     }
 
     @Override
diff --git a/src/main/java/org/traccar/protocol/HuabaoProtocolDecoder.java b/src/main/java/org/traccar/protocol/HuabaoProtocolDecoder.java
index 8afe04d0f..443da28a3 100644
--- a/src/main/java/org/traccar/protocol/HuabaoProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/HuabaoProtocolDecoder.java
@@ -323,77 +323,39 @@ public class HuabaoProtocolDecoder extends BaseProtocolDecoder {
             int type = buf.readUnsignedByte();
             int length = buf.readUnsignedByte();
             switch (type) {
-                case 0x01:
-                    position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 100L);
-                    break;
-                case 0x02:
-                    position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedShort() * 0.1);
-                    break;
-                case 0x03:
-                    position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() * 0.1);
-                    break;
-                case 0x56:
+                case 0x01 -> position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 100L);
+                case 0x02 -> position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedShort() * 0.1);
+                case 0x03 -> position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() * 0.1);
+                case 0x56 -> {
                     buf.readUnsignedByte(); // power level
                     position.set(Position.KEY_BATTERY_LEVEL, buf.readUnsignedByte());
-                    break;
-                case 0x61:
-                    position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
-                    break;
-                case 0x69:
-                    position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
-                    break;
-                case 0x80:
-                    position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte());
-                    break;
-                case 0x81:
-                    position.set(Position.KEY_RPM, buf.readUnsignedShort());
-                    break;
-                case 0x82:
-                    position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.1);
-                    break;
-                case 0x83:
-                    position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedByte());
-                    break;
-                case 0x84:
-                    position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedByte() - 40);
-                    break;
-                case 0x85:
-                    position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort());
-                    break;
-                case 0x86:
-                    position.set("intakeTemp", buf.readUnsignedByte() - 40);
-                    break;
-                case 0x87:
-                    position.set("intakeFlow", buf.readUnsignedShort());
-                    break;
-                case 0x88:
-                    position.set("intakePressure", buf.readUnsignedByte());
-                    break;
-                case 0x89:
-                    position.set(Position.KEY_THROTTLE, buf.readUnsignedByte());
-                    break;
-                case 0x8B:
+                }
+                case 0x61 -> position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
+                case 0x69 -> position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
+                case 0x80 -> position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte());
+                case 0x81 -> position.set(Position.KEY_RPM, buf.readUnsignedShort());
+                case 0x82 -> position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.1);
+                case 0x83 -> position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedByte());
+                case 0x84 -> position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedByte() - 40);
+                case 0x85 -> position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort());
+                case 0x86 -> position.set("intakeTemp", buf.readUnsignedByte() - 40);
+                case 0x87 -> position.set("intakeFlow", buf.readUnsignedShort());
+                case 0x88 -> position.set("intakePressure", buf.readUnsignedByte());
+                case 0x89 -> position.set(Position.KEY_THROTTLE, buf.readUnsignedByte());
+                case 0x8B -> {
                     position.set(Position.KEY_VIN, buf.readCharSequence(17, StandardCharsets.US_ASCII).toString());
-                    break;
-                case 0x8C:
-                    position.set(Position.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 100L);
-                    break;
-                case 0x8D:
-                    position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedShort() * 1000L);
-                    break;
-                case 0x8E:
-                    position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
-                    break;
-                case 0xA0:
+                }
+                case 0x8C -> position.set(Position.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 100L);
+                case 0x8D -> position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedShort() * 1000L);
+                case 0x8E -> position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
+                case 0xA0 -> {
                     String codes = buf.readCharSequence(length, StandardCharsets.US_ASCII).toString();
                     position.set(Position.KEY_DTCS, codes.replace(',', ' '));
-                    break;
-                case 0xCC:
+                }
+                case 0xCC -> {
                     position.set(Position.KEY_ICCID, buf.readCharSequence(20, StandardCharsets.US_ASCII).toString());
-                    break;
-                default:
-                    buf.skipBytes(length);
-                    break;
+                }
+                default -> buf.skipBytes(length);
             }
         }
     }
@@ -543,20 +505,10 @@ public class HuabaoProtocolDecoder extends BaseProtocolDecoder {
                     buf.readUnsignedInt(); // alarm serial number
                     buf.readUnsignedByte(); // alarm status
                     switch (buf.readUnsignedByte()) {
-                        case 0x01:
-                            position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
-                            break;
-                        case 0x02:
-                            position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
-                            break;
-                        case 0x03:
-                            position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
-                            break;
-                        case 0x16:
-                            position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
-                            break;
-                        default:
-                            break;
+                        case 0x01 -> position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                        case 0x02 -> position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                        case 0x03 -> position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                        case 0x16 -> position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
                     }
                     break;
                 case 0x69:
@@ -718,60 +670,26 @@ public class HuabaoProtocolDecoder extends BaseProtocolDecoder {
                         int extendedType = buf.readUnsignedShort();
                         int extendedLength = buf.readUnsignedByte();
                         switch (extendedType) {
-                            case 0x0002:
-                                position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() * 0.1);
-                                break;
-                            case 0x0003:
-                                position.set(Position.KEY_RPM, buf.readUnsignedShort());
-                                break;
-                            case 0x0004:
-                                position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
-                                break;
-                            case 0x0005:
-                                position.set(Position.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 100);
-                                break;
-                            case 0x0007:
-                                position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort() * 0.1);
-                                break;
-                            case 0x0008:
-                                position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedShort() * 0.1);
-                                break;
-                            case 0x0009:
-                                position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedShort() - 40);
-                                break;
-                            case 0x000B:
-                                position.set("intakePressure", buf.readUnsignedShort());
-                                break;
-                            case 0x000C:
-                                position.set("intakeTemp", buf.readUnsignedShort() - 40);
-                                break;
-                            case 0x000D:
-                                position.set("intakeFlow", buf.readUnsignedShort());
-                                break;
-                            case 0x000E:
-                                position.set(Position.KEY_THROTTLE, buf.readUnsignedShort() * 100 / 255);
-                                break;
-                            case 0x0050:
+                            case 0x0002 -> position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() * 0.1);
+                            case 0x0003 -> position.set(Position.KEY_RPM, buf.readUnsignedShort());
+                            case 0x0004 -> position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
+                            case 0x0005 -> position.set(Position.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 100);
+                            case 0x0007 -> position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort() * 0.1);
+                            case 0x0008 -> position.set(Position.KEY_ENGINE_LOAD, buf.readUnsignedShort() * 0.1);
+                            case 0x0009 -> position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedShort() - 40);
+                            case 0x000B -> position.set("intakePressure", buf.readUnsignedShort());
+                            case 0x000C -> position.set("intakeTemp", buf.readUnsignedShort() - 40);
+                            case 0x000D -> position.set("intakeFlow", buf.readUnsignedShort());
+                            case 0x000E -> position.set(Position.KEY_THROTTLE, buf.readUnsignedShort() * 100 / 255);
+                            case 0x0050 -> {
                                 position.set(Position.KEY_VIN, buf.readSlice(17).toString(StandardCharsets.US_ASCII));
-                                break;
-                            case 0x0100:
-                                position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedShort() * 0.1);
-                                break;
-                            case 0x0102:
-                                position.set("tripFuel", buf.readUnsignedShort() * 0.1);
-                                break;
-                            case 0x0112:
-                                position.set("hardAccelerationCount", buf.readUnsignedShort());
-                                break;
-                            case 0x0113:
-                                position.set("hardDecelerationCount", buf.readUnsignedShort());
-                                break;
-                            case 0x0114:
-                                position.set("hardCorneringCount", buf.readUnsignedShort());
-                                break;
-                            default:
-                                buf.skipBytes(extendedLength);
-                                break;
+                            }
+                            case 0x0100 -> position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedShort() * 0.1);
+                            case 0x0102 -> position.set("tripFuel", buf.readUnsignedShort() * 0.1);
+                            case 0x0112 -> position.set("hardAccelerationCount", buf.readUnsignedShort());
+                            case 0x0113 -> position.set("hardDecelerationCount", buf.readUnsignedShort());
+                            case 0x0114 -> position.set("hardCorneringCount", buf.readUnsignedShort());
+                            default -> buf.skipBytes(extendedLength);
                         }
                     }
                     break;
@@ -779,11 +697,8 @@ public class HuabaoProtocolDecoder extends BaseProtocolDecoder {
                     position.set(Position.KEY_BATTERY, buf.readUnsignedInt() * 0.001);
                     if (length >= 5) {
                         short batteryStatus = buf.readUnsignedByte();
-                        switch (batteryStatus) {
-                            case 2:
-                            case 3:
-                                position.set(Position.KEY_CHARGE, true);
-                            default:
+                        if (batteryStatus == 2 || batteryStatus == 3) {
+                            position.set(Position.KEY_CHARGE, true);
                         }
                     }
                     if (length >= 6) {
@@ -1000,77 +915,34 @@ public class HuabaoProtocolDecoder extends BaseProtocolDecoder {
                         int id = buf.readUnsignedShort();
                         int length = buf.readUnsignedByte();
                         switch (id) {
-                            case 0x0102:
-                            case 0x0528:
-                            case 0x0546:
+                            case 0x0102, 0x0528, 0x0546 -> {
                                 position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 100);
-                                break;
-                            case 0x0103:
-                                position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedInt() * 0.01);
-                                break;
-                            case 0x0111:
-                                position.set("fuelTemp", buf.readUnsignedByte() - 40);
-                                break;
-                            case 0x012E:
-                                position.set("oilLevel", buf.readUnsignedShort() * 0.1);
-                                break;
-                            case 0x052A:
-                                position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedShort() * 0.01);
-                                break;
-                            case 0x0105:
-                            case 0x052C:
-                                position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.01);
-                                break;
-                            case 0x014A:
-                            case 0x0537:
-                            case 0x0538:
-                            case 0x0539:
+                            }
+                            case 0x0103 -> position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedInt() * 0.01);
+                            case 0x0111 -> position.set("fuelTemp", buf.readUnsignedByte() - 40);
+                            case 0x012E -> position.set("oilLevel", buf.readUnsignedShort() * 0.1);
+                            case 0x052A -> position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedShort() * 0.01);
+                            case 0x0105, 0x052C -> position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.01);
+                            case 0x014A, 0x0537, 0x0538, 0x0539 -> {
                                 position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedShort() * 0.01);
-                                break;
-                            case 0x052B:
-                                position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
-                                break;
-                            case 0x052D:
-                                position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedByte() - 40);
-                                break;
-                            case 0x052E:
-                                position.set("airTemp", buf.readUnsignedByte() - 40);
-                                break;
-                            case 0x0530:
-                                position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
-                                break;
-                            case 0x0535:
-                                position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() * 0.1);
-                                break;
-                            case 0x0536:
-                                position.set(Position.KEY_RPM, buf.readUnsignedShort());
-                                break;
-                            case 0x053D:
-                                position.set("intakePressure", buf.readUnsignedShort() * 0.1);
-                                break;
-                            case 0x0544:
-                                position.set("liquidLevel", buf.readUnsignedByte());
-                                break;
-                            case 0x0547:
-                            case 0x0548:
-                                position.set(Position.KEY_THROTTLE, buf.readUnsignedByte());
-                                break;
-                            default:
+                            }
+                            case 0x052B -> position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
+                            case 0x052D -> position.set(Position.KEY_COOLANT_TEMP, buf.readUnsignedByte() - 40);
+                            case 0x052E -> position.set("airTemp", buf.readUnsignedByte() - 40);
+                            case 0x0530 -> position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
+                            case 0x0535 -> position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() * 0.1);
+                            case 0x0536 -> position.set(Position.KEY_RPM, buf.readUnsignedShort());
+                            case 0x053D -> position.set("intakePressure", buf.readUnsignedShort() * 0.1);
+                            case 0x0544 -> position.set("liquidLevel", buf.readUnsignedByte());
+                            case 0x0547, 0x0548 -> position.set(Position.KEY_THROTTLE, buf.readUnsignedByte());
+                            default -> {
                                 switch (length) {
-                                    case 1:
-                                        position.set(Position.PREFIX_IO + id, buf.readUnsignedByte());
-                                        break;
-                                    case 2:
-                                        position.set(Position.PREFIX_IO + id, buf.readUnsignedShort());
-                                        break;
-                                    case 4:
-                                        position.set(Position.PREFIX_IO + id, buf.readUnsignedInt());
-                                        break;
-                                    default:
-                                        buf.skipBytes(length);
-                                        break;
+                                    case 1 -> position.set(Position.PREFIX_IO + id, buf.readUnsignedByte());
+                                    case 2 -> position.set(Position.PREFIX_IO + id, buf.readUnsignedShort());
+                                    case 4 -> position.set(Position.PREFIX_IO + id, buf.readUnsignedInt());
+                                    default -> buf.skipBytes(length);
                                 }
-                                break;
+                            }
                         }
                     }
                     getLastLocation(position, time);
@@ -1151,24 +1023,12 @@ public class HuabaoProtocolDecoder extends BaseProtocolDecoder {
                 case 0x15:
                     int event = buf.readInt();
                     switch (event) {
-                        case 51:
-                            position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
-                            break;
-                        case 52:
-                            position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
-                            break;
-                        case 53:
-                            position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
-                            break;
-                        case 54:
-                            position.set(Position.KEY_ALARM, Position.ALARM_LANE_CHANGE);
-                            break;
-                        case 56:
-                            position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
-                            break;
-                        default:
-                            position.set(Position.KEY_EVENT, event);
-                            break;
+                        case 51 -> position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                        case 52 -> position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                        case 53 -> position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                        case 54 -> position.set(Position.KEY_ALARM, Position.ALARM_LANE_CHANGE);
+                        case 56 -> position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
+                        default -> position.set(Position.KEY_EVENT, event);
                     }
                     getLastLocation(position, time);
                     break;
diff --git a/src/main/java/org/traccar/schedule/TaskReports.java b/src/main/java/org/traccar/schedule/TaskReports.java
index 070fa9d2b..c57158cb9 100644
--- a/src/main/java/org/traccar/schedule/TaskReports.java
+++ b/src/main/java/org/traccar/schedule/TaskReports.java
@@ -116,34 +116,32 @@ public class TaskReports implements ScheduleTask {
         for (User user : users) {
             LogAction.report(user.getId(), true, report.getType(), from, to, deviceIds, groupIds);
             switch (report.getType()) {
-                case "events":
+                case "events" -> {
                     var eventsReportProvider = injector.getInstance(EventsReportProvider.class);
                     reportMailer.sendAsync(user.getId(), stream -> eventsReportProvider.getExcel(
                             stream, user.getId(), deviceIds, groupIds, List.of(), from, to));
-                    break;
-                case "route":
+                }
+                case "route" -> {
                     var routeReportProvider = injector.getInstance(RouteReportProvider.class);
                     reportMailer.sendAsync(user.getId(), stream -> routeReportProvider.getExcel(
                             stream, user.getId(), deviceIds, groupIds, from, to));
-                    break;
-                case "summary":
+                }
+                case "summary" -> {
                     var summaryReportProvider = injector.getInstance(SummaryReportProvider.class);
                     reportMailer.sendAsync(user.getId(), stream -> summaryReportProvider.getExcel(
                             stream, user.getId(), deviceIds, groupIds, from, to, false));
-                    break;
-                case "trips":
+                }
+                case "trips" -> {
                     var tripsReportProvider = injector.getInstance(TripsReportProvider.class);
                     reportMailer.sendAsync(user.getId(), stream -> tripsReportProvider.getExcel(
                             stream, user.getId(), deviceIds, groupIds, from, to));
-                    break;
-                case "stops":
+                }
+                case "stops" -> {
                     var stopsReportProvider = injector.getInstance(StopsReportProvider.class);
                     reportMailer.sendAsync(user.getId(), stream -> stopsReportProvider.getExcel(
                             stream, user.getId(), deviceIds, groupIds, from, to));
-                    break;
-                default:
-                    LOGGER.warn("Unsupported report type {}", report.getType());
-                    break;
+                }
+                default -> LOGGER.warn("Unsupported report type {}", report.getType());
             }
         }
     }
diff --git a/src/main/java/org/traccar/session/ConnectionManager.java b/src/main/java/org/traccar/session/ConnectionManager.java
index 8431a0327..a80c6aad1 100644
--- a/src/main/java/org/traccar/session/ConnectionManager.java
+++ b/src/main/java/org/traccar/session/ConnectionManager.java
@@ -241,17 +241,11 @@ public class ConnectionManager implements BroadcastInterface {
         if (!status.equals(oldStatus)) {
             String eventType;
             Map<Event, Position> events = new HashMap<>();
-            switch (status) {
-                case Device.STATUS_ONLINE:
-                    eventType = Event.TYPE_DEVICE_ONLINE;
-                    break;
-                case Device.STATUS_UNKNOWN:
-                    eventType = Event.TYPE_DEVICE_UNKNOWN;
-                    break;
-                default:
-                    eventType = Event.TYPE_DEVICE_OFFLINE;
-                    break;
-            }
+            eventType = switch (status) {
+                case Device.STATUS_ONLINE -> Event.TYPE_DEVICE_ONLINE;
+                case Device.STATUS_UNKNOWN -> Event.TYPE_DEVICE_UNKNOWN;
+                default -> Event.TYPE_DEVICE_OFFLINE;
+            };
             events.put(new Event(eventType, deviceId), null);
             notificationManager.updateEvents(events);
         }