Fixed issue with build.

Changed MainGame to create a thread instead of a client and used the client as input for the thread
Changed client to extend Controller instead of thread

core/src/netwerkprog/game/MainGame.java

@@ -21,7 +21,7 @@ public class MainGame extends ApplicationAdapter {
     float screenWidth;
     float screenHeight;
     private FrameRate frameRate;
-    private Client client;
+    private Thread client;
 
     @Override
     public void create() {
@@ -39,12 +39,12 @@ public class MainGame extends ApplicationAdapter {
         music.setVolume(.1f);
         music.play();
         music.setLooping(true);
-
         connectToServer();
     }
 
+
     private void connectToServer() {
-        client = new Client("localhost", Server.PORT);
+        client = new Thread(new Client("localhost", Server.PORT));
         try {
             client.start();
         } catch (Exception e) {

core/src/netwerkprog/game/client/Client.java

@@ -14,10 +14,7 @@ public class Client extends Controller {
     private String hostname;
     private boolean isConnected = true;
 
-    @Override
+
-    public void run() {
-        this.connect();
-    }
 
     public Client(String hostname, int port) {
         this.port = port;
@@ -74,4 +71,9 @@ public class Client extends Controller {
             }
         }
     }
+
+    @Override
+    public void run() {
+        this.connect();
+    }
 }