src/GameBoard.java

@@ -56,12 +56,9 @@ public class GameBoard extends JPanel {
         List<Ship> shipsP1 =p1.getBoard().getShips();
         List<Ship> shipsP2 =p2.getBoard().getShips();
 
-        giveUpButton.addActionListener(new ActionListener() {
+        giveUpButton.addActionListener((e) -> {
-            @Override
+            frame.showPanel("MainMenu");
-            public void actionPerformed(ActionEvent e) {
+            p1.withdraw();
-                // TODO Hier könnte Ihr Backend Code stehen
-                frame.showPanel("MainMenu");
-            }
         });
     }
 

src/LocalPlayer.java

@@ -33,7 +33,7 @@ public class LocalPlayer extends Player {
         switch (hitResponse.getType()) {
             case HIT, SUNK -> this.myTurn = false;
             case MISS -> this.myTurn = true;
-            case VICTORY -> GameController.getMainFrame().showPanelLose("LoseScreen", this);
+            case VICTORY -> this.lose();
         }
         GameController.getMainFrame().refreshGameBoard();
     }
@@ -49,7 +49,7 @@ public class LocalPlayer extends Player {
         switch (hitResponse.getType()) {
             case HIT, SUNK -> this.myTurn = true;
             case MISS -> this.myTurn = false;
-            case VICTORY -> GameController.getMainFrame().showPanelWin("", this);
+            case VICTORY -> this.win();
         }
         GameController.getMainFrame().refreshGameBoard();
     }

src/OnlinePlayer_1_1_0.java

@@ -84,10 +84,7 @@ public class OnlinePlayer_1_1_0 extends OnlinePlayer {
 				break;
 
 			case "WITHDRAW":
-				//Found funny cheese to do this without GUI Access
+				this.withdraw();
-				HitResponse tmp_hit = new HitResponse(0, new Point(0,0));
-				tmp_hit.setType(HitResponseType.VICTORY);
-				this.receiveHit(tmp_hit);
 				break;
 
 			default:
@@ -160,4 +157,10 @@ public class OnlinePlayer_1_1_0 extends OnlinePlayer {
 		// SHOULD NEVER BE CALLED ON ONLINE PLAYER. ONLY ON HUMAN PLAYER
 		return;
 	}
+
+	@Override
+	public void receiveWithdraw() {
+		this.socket.send(new SocketPackage("WITHDRAW"));
+		super.receiveWithdraw();
+	}
 }

src/Player.java

@@ -137,6 +137,7 @@ public abstract class Player {
      * and players
      * 
      * This method should be called at the end of a game
+     * This method should be called at the end of a game
      * 
      * @author Luca Conte
      */
@@ -146,4 +147,20 @@ public abstract class Player {
         this.board = null;
         this.enemy = null;
     }
+
+    public void win() {
+        GameController.getMainFrame().showPanelWin("", this);
+    }
+    public void lose() {
+        GameController.getMainFrame().showPanelLose("", this);
+    }
+
+    public void withdraw() {
+        this.enemy.receiveWithdraw();
+        this.lose();
+    }
+
+    public void receiveWithdraw(){
+        this.win();
+    }
 }