8 files changed, 88 insertions, 65 deletions
diff --git a/src/org/traccar/http/AsyncServlet.java b/src/org/traccar/http/AsyncServlet.java
index 47ffda3ad..0fc1cd2fb 100644
--- a/src/org/traccar/http/AsyncServlet.java
+++ b/src/org/traccar/http/AsyncServlet.java
@@ -57,10 +57,10 @@ public class AsyncServlet extends BaseServlet {
         
         private boolean destroyed;
         private final long userId;
-        private final Set<Long> devices = new HashSet<Long>();
+        private final Set<Long> devices = new HashSet<>();
         private Timeout sessionTimeout;
         private Timeout requestTimeout;
-        private final Map<Long, Position> positions = new HashMap<Long, Position>();
+        private final Map<Long, Position> positions = new HashMap<>();
         private AsyncContext activeContext;
         
         private void logEvent(String message) {
@@ -177,7 +177,7 @@ public class AsyncServlet extends BaseServlet {
         
     }
     
-    private static final Map<Long, AsyncSession> asyncSessions = new HashMap<Long, AsyncSession>();
+    private static final Map<Long, AsyncSession> asyncSessions = new HashMap<>();
     
     public static void sessionRefreshUser(long userId) {
         asyncSessions.remove(userId);
diff --git a/src/org/traccar/http/CommandsServlet.java b/src/org/traccar/http/CommandsServlet.java
index bf40b79e6..8b3d43fe7 100644
--- a/src/org/traccar/http/CommandsServlet.java
+++ b/src/org/traccar/http/CommandsServlet.java
@@ -1,29 +1,29 @@
 package org.traccar.http;
 
-import org.traccar.Context;
-import org.traccar.database.ActiveDevice;
-import org.traccar.command.CommandType;
-import org.traccar.command.GpsCommand;
-
 import javax.json.Json;
 import javax.json.JsonObject;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import org.traccar.Context;
+import org.traccar.command.CommandType;
+import org.traccar.command.GpsCommand;
+import org.traccar.database.ActiveDevice;
 
 public class CommandsServlet extends BaseServlet {
 
     @Override
     protected boolean handle(String command, HttpServletRequest req, HttpServletResponse resp) throws Exception {
-        if (command.equals("/send")) {
-            send(req, resp);
-        }
-        else if (command.equals("/raw")) {
-            sendRawCommand(req, resp);
-        }
-        else {
-            return false;
+        
+        switch (command) {
+            case "/send":
+                send(req, resp);
+                return true;
+            case "/raw":
+                sendRawCommand(req, resp);
+                return true;
+            default:
+                return false;
         }
-        return true;
     }
 
     private void send(HttpServletRequest req, HttpServletResponse resp) throws Exception {
diff --git a/src/org/traccar/http/DeviceServlet.java b/src/org/traccar/http/DeviceServlet.java
index 2a3e15a80..d1af1c106 100644
--- a/src/org/traccar/http/DeviceServlet.java
+++ b/src/org/traccar/http/DeviceServlet.java
@@ -24,16 +24,22 @@ public class DeviceServlet extends BaseServlet {
 
     @Override
     protected boolean handle(String command, HttpServletRequest req, HttpServletResponse resp) throws Exception {
-        if (command.equals("/get")) {
-            get(req, resp);
-        } else if (command.equals("/add")) {
-            add(req, resp);
-        } else if (command.equals("/update")) {
-            update(req, resp);
-        } else if (command.equals("/remove")) {
-            remove(req, resp);
-        } else {
-            return false;
+
+        switch (command) {
+            case "/get":
+                get(req, resp);
+                break;
+            case "/add":
+                add(req, resp);
+                break;
+            case "/update":
+                update(req, resp);
+                break;
+            case "/remove":
+                remove(req, resp);
+                break;
+            default:
+                return false;
         }
         return true;
     }
diff --git a/src/org/traccar/http/JsonConverter.java b/src/org/traccar/http/JsonConverter.java
index d658ef7d6..d8773ec1f 100644
--- a/src/org/traccar/http/JsonConverter.java
+++ b/src/org/traccar/http/JsonConverter.java
@@ -30,7 +30,6 @@ import javax.json.JsonArrayBuilder;
 import javax.json.JsonObject;
 import javax.json.JsonObjectBuilder;
 import javax.json.JsonValue;
-
 import org.traccar.model.Factory;
 
 public class JsonConverter {
@@ -89,9 +88,7 @@ public class JsonConverter {
                         populateObject(json.getJsonObject(name), nestedObject);
                         method.invoke(object, nestedObject);
                     }
-                } catch (IllegalAccessException error) {
-                } catch (InvocationTargetException error) {
-                } catch (InstantiationException e) {
+                } catch (IllegalAccessException | InvocationTargetException | InstantiationException error) {
                 }
             }
         }
@@ -130,8 +127,7 @@ public class JsonConverter {
                             json.add(name, dateFormat.format(value));
                         }
                     }
-                } catch (IllegalAccessException error) {
-                } catch (InvocationTargetException error) {
+                } catch (IllegalAccessException | InvocationTargetException error) {
                 }
             }
         }
diff --git a/src/org/traccar/http/MainServlet.java b/src/org/traccar/http/MainServlet.java
index 18430f0c3..29eaaec33 100644
--- a/src/org/traccar/http/MainServlet.java
+++ b/src/org/traccar/http/MainServlet.java
@@ -26,18 +26,24 @@ public class MainServlet extends BaseServlet {
 
     @Override
     protected boolean handle(String command, HttpServletRequest req, HttpServletResponse resp) throws Exception {
-        if (command.equals("/session")) {
-            session(req, resp);
-        } else if (command.equals("/login")) {
-            login(req, resp);
-        } else if (command.equals("/logout")) {
-            logout(req, resp);
-        } else if (command.equals("/register")) {
-            register(req, resp);
-        } else {
-            return false;
+        
+        switch (command) {
+            case "/session":
+                session(req, resp);
+                break;
+            case "/login":
+                login(req, resp);
+                break;
+            case "/logout":
+                logout(req, resp);
+                break;
+            case "/register":
+                register(req, resp);
+                break;
+            default:
+                return false;
         }
-        return true;
+        return true;        
     }
 
     private void session(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
diff --git a/src/org/traccar/http/PositionServlet.java b/src/org/traccar/http/PositionServlet.java
index 57b411a79..6f973be3c 100644
--- a/src/org/traccar/http/PositionServlet.java
+++ b/src/org/traccar/http/PositionServlet.java
@@ -23,10 +23,15 @@ public class PositionServlet extends BaseServlet {
 
     @Override
     protected boolean handle(String command, HttpServletRequest req, HttpServletResponse resp) throws Exception {
-        if (command.equals("/get")) {
-            get(req, resp);
+
+        switch (command) {
+            case "/get":
+                get(req, resp);
+                break;
+            default:
+                return false;
         }
-        return true;
+        return true;        
     }
     
     private void get(HttpServletRequest req, HttpServletResponse resp) throws Exception {
diff --git a/src/org/traccar/http/ServerServlet.java b/src/org/traccar/http/ServerServlet.java
index d814769a8..836a109fc 100644
--- a/src/org/traccar/http/ServerServlet.java
+++ b/src/org/traccar/http/ServerServlet.java
@@ -24,14 +24,18 @@ public class ServerServlet extends BaseServlet {
 
     @Override
     protected boolean handle(String command, HttpServletRequest req, HttpServletResponse resp) throws Exception {
-        if (command.equals("/get")) {
-            get(req, resp);
-        } else if (command.equals("/update")) {
-            update(req, resp);
-        } else {
-            return false;
+
+        switch (command) {
+            case "/get":
+                get(req, resp);
+                break;
+            case "/update":
+                update(req, resp);
+                break;
+            default:
+                return false;
         }
-        return true;
+        return true;        
     }
     
     private void get(HttpServletRequest req, HttpServletResponse resp) throws Exception {
diff --git a/src/org/traccar/http/UserServlet.java b/src/org/traccar/http/UserServlet.java
index 71af74485..976a62890 100644
--- a/src/org/traccar/http/UserServlet.java
+++ b/src/org/traccar/http/UserServlet.java
@@ -24,18 +24,24 @@ public class UserServlet extends BaseServlet {
 
     @Override
     protected boolean handle(String command, HttpServletRequest req, HttpServletResponse resp) throws Exception {
-        if (command.equals("/get")) {
-            get(req, resp);
-        } else if (command.equals("/add")) {
-            add(req, resp);
-        } else if (command.equals("/update")) {
-            update(req, resp);
-        } else if (command.equals("/remove")) {
-            remove(req, resp);
-        } else {
-            return false;
+
+        switch (command) {
+            case "/get":
+                get(req, resp);
+                break;
+            case "/add":
+                add(req, resp);
+                break;
+            case "/update":
+                update(req, resp);
+                break;
+            case "/remove":
+                remove(req, resp);
+                break;
+            default:
+                return false;
         }
-        return true;
+        return true;        
     }
     
     private void get(HttpServletRequest req, HttpServletResponse resp) throws Exception {