Added GameOver() Method to Player class, btw System.out.flush just straight up Thanos's the terminal at the time (clears it).

src/Player.java

@@ -108,4 +108,9 @@ public class Player {
             this.guns = guns;
         }
     }
+
+    public void gameOver() {
+        System.out.flush();
+        System.out.println("Game over");
+    }
 }

src/ShipWarfare.java

@@ -49,10 +49,6 @@ public class ShipWarfare extends Player {
         TimeUnit.SECONDS.sleep(1);
     }
 
-    public void gameOver() {
-        System.out.flush();
-        System.out.println("Game over");
-    }
 
     public int numOfShips() {