Users can now resee the lobby after exit and reentering, and fixed concurrent alteration issue which was stopping players from exiting the lobby.

racevisionGame/src/main/java/visualiser/Controllers/InGameLobbyController.java

@@ -143,7 +143,9 @@ public class InGameLobbyController extends Controller {
                 int count = 0;
                 int row = 0;
 
-                for (VisualiserBoat boat :visualiserRaceEvent.getVisualiserRaceState().getBoats()) {
+                ArrayList<VisualiserBoat> copy = new ArrayList<>(visualiserRaceEvent.getVisualiserRaceState().getBoats());
+
+                for (VisualiserBoat boat : copy) {
                     View3D playerBoatToSet = new View3D();
                     playerBoatToSet.setItems(subjects);
 

racevisionGame/src/main/java/visualiser/Controllers/LobbyController.java

@@ -173,7 +173,6 @@ public class LobbyController extends Controller {
      * Adds the games received from the server
      */
     private void addServerGames() {
-        httpMatchBrowserClient.connections.clear();
         httpMatchBrowserClient.connections.addAll(customConnections);
         httpMatchBrowserClient.connections.addListener(new ListChangeListener<RaceConnection>() {
             @Override

racevisionGame/src/main/java/visualiser/model/VisualiserRaceEvent.java

@@ -116,6 +116,8 @@ public class VisualiserRaceEvent {
         this.visualiserRaceServiceThread.interrupt();
         this.serverConnectionThread.interrupt();
         serverConnection.terminate();
+        if (HttpMatchBrowserHost.httpMatchBrowserHost != null) {
             HttpMatchBrowserHost.httpMatchBrowserHost.interrupt();
         }
     }
+}

racevisionGame/src/main/java/visualiser/network/HttpMatchBrowserClient.java

@@ -23,6 +23,8 @@ public class HttpMatchBrowserClient extends Thread {
         while(!Thread.interrupted()) {
             try {
                 JSONArray cons = JsonReader.readJsonFromUrlArray("http://api.umbrasheep.com/seng/get_matches/");
+                connections.clear();
+
                 for (int i = 0; i < cons.length(); i++) {
                     JSONObject con = (JSONObject) cons.get(i);
                     connections.add(new RaceConnection((String) con.get("ip_address"), con.getInt("port"), "Boat Game"));