add exit method

core/src/netwerkprog/game/client/MainGame.java

@@ -320,6 +320,12 @@ public class MainGame extends Game implements ClientCallback {
         return map.getWidth();
     }
 
+    public void exit() {
+        client.disconnect();
+        dispose();
+        Gdx.app.exit();
+    }
+
     public void setSelectedCharacter(GameCharacter character) {
         if  (!character.isDead()) {
             this.selectedCharacter = character;

core/src/netwerkprog/game/client/game/map/GameInputProcessor.java

@@ -128,6 +128,10 @@ public class GameInputProcessor implements InputProcessor {
                 mainGame.chooseHacker();
             }
 
+        } else if (mainGame.getGamestate() == GAMESTATE.ENDED) {
+            if (keycode == Input.Keys.ESCAPE) {
+                mainGame.exit();
+            }
         }
         return false;
     }

core/src/netwerkprog/game/util/tree/AbstractTree.java

@@ -5,8 +5,8 @@ public abstract class AbstractTree<E> implements Tree<E> {
   public void inorder() {
   }
 
-  @Override /* Postorder traversal from the root */
-  public void postorder() {
+  @Override /* Post order traversal from the root */
+  public void postOrder() {
   }
 
   @Override /* Preorder traversal from the root */

core/src/netwerkprog/game/util/tree/BST.java

@@ -141,7 +141,7 @@ public class BST<E extends Comparable<E>> extends AbstractTree<E> {
      * Post order traversal from the root
      */
     @Override
-    public void postorder() {
+    public void postOrder() {
         postorder(root);
     }
 

core/src/netwerkprog/game/util/tree/Tree.java

@@ -16,7 +16,7 @@ public interface Tree<E> extends Iterable<E> {
   public void inorder();
 
   /** Postorder traversal from the root */
-  public void postorder();
+  public void postOrder();
 
   /** Preorder traversal from the root */
   public void preorder();