Update: fixed spelling.

src/main/java/de/hdm_stuttgart/battlearena/Model/Multiplayer/TestServer/Client.java

@@ -20,16 +20,17 @@ public class Client {
         in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
     }
 
-    public int sendMessage(int number) throws IOException {
+    public int sendX(int number) throws IOException {
         out.println(number);
         return number;
     }
 
-    public int receiveInt() throws IOException {
-        String response = in.readLine();
-        return Integer.parseInt(response);
+    public int sendY(int number) throws IOException {
+        out.println(number);
+        return number;
     }
 
+
     public void stopConnection() throws IOException {
         in.close();
         out.close();

src/main/java/de/hdm_stuttgart/battlearena/Model/Multiplayer/TestServer/ConnectionHandling.java

@@ -9,9 +9,14 @@ public class ConnectionHandling {
         Client client = new Client();
         client.startConnection("localhost", 4444);
         for (int i = 0; i < 10; i++){
-            int resp1 = client.sendMessage(1);
-            System.out.println(resp1);
+            int x = client.sendX(1);
+            System.out.println(x);
+
+            int y = client.sendX(0);
+            System.out.println(y);
+
             TimeUnit.SECONDS.sleep(1);
         }
     }
+
 }

src/main/java/de/hdm_stuttgart/battlearena/Model/Multiplayer/TestServer/Server.java

@@ -5,10 +5,12 @@ import java.io.*;
 
 public class Server {
     private ServerSocket serverSocket;
+    private static BufferedReader px;
+    private static BufferedReader py;
 
     public static void main(String[] args) throws IOException {
         Server server = new Server();
-        server.start("lolcalhost",4444);
+        server.start("localhost",4444);
     }
 
     public void start(String lolcalhost, int port) throws IOException {
@@ -27,7 +29,7 @@ public class Server {
         private Socket clientSocket;
         private PrintWriter out;
         private BufferedReader in;
-        private static BufferedReader px;
+
 
         public EchoClientHandler(Socket socket) {
             this.clientSocket = socket;