Fixed double thread issue! :D

src/main/java/seng302/gameServer/GameState.java

@@ -91,7 +91,6 @@ public class GameState implements Runnable {
 
         resetStartTime();
 
-        new Thread(this).start();   //Run the auto updates on the game state
         new Thread(this, "GameState").start();   //Run the auto updates on the game state
 
         marks = new MarkOrder().getAllMarks();

src/main/java/seng302/gameServer/HeartbeatThread.java

@@ -13,7 +13,7 @@ import seng302.gameServer.server.messages.Message;
  * Will call .clientDisconnected on the delegate when a heartbeat message
  * cannot be sent to a player
  */
-public class HeartbeatThread extends Thread{
+public class HeartbeatThread implements Runnable {
     private final int HEARTBEAT_PERIOD = 200;
     private ClientConnectionDelegate delegate;
     private Integer seqNum;
@@ -23,6 +23,9 @@ public class HeartbeatThread extends Thread{
         this.delegate =  delegate;
         seqNum = 0;
         disconnectedPlayers = new Stack<>();
+
+        Thread thread = new Thread(this, "HeartBeat");
+        thread.start();
     }
 
     /**

src/main/java/seng302/gameServer/MainServerThread.java

@@ -56,14 +56,9 @@ public class MainServerThread implements Runnable, ClientConnectionDelegate {
 
 
     public void run() {
-        ServerListenThread serverListenThread;
-        HeartbeatThread heartbeatThread;
 
-        serverListenThread = new ServerListenThread(serverSocket, this);
+        new HeartbeatThread(this);
-        heartbeatThread = new HeartbeatThread(this);
+        new ServerListenThread(serverSocket, this);
-
-        heartbeatThread.start();
-        serverListenThread.start();
 
         //You should handle interrupts in some way, so that the thread won't keep on forever if you exit the app.
         while (!terminated) {

src/main/java/seng302/gameServer/ServerListenThread.java

@@ -8,13 +8,16 @@ import java.net.Socket;
  * A class for a thread to listen to connections
  * Created by wmu16 on 11/07/17.
  */
-public class ServerListenThread extends Thread{
+public class ServerListenThread implements Runnable {
     private ServerSocket serverSocket;
     private ClientConnectionDelegate delegate;
 
     public ServerListenThread(ServerSocket serverSocket, ClientConnectionDelegate delegate){
         this.serverSocket = serverSocket;
         this.delegate = delegate;
+
+        Thread thread = new Thread(this, "ServerListen");
+        thread.start();
     }
 
     /**