update

src/main/java/Snake/Controller.java

@@ -12,6 +12,19 @@ public class Controller {
     private boolean inputHandled;
     private GameState gameState;
 
+    private void initializeInputHandling()
+    {
+        final int CONDITION = JComponent.WHEN_IN_FOCUSED_WINDOW;
+        gameView.getInputMap(CONDITION).put(KeyStroke.getKeyStroke("W"), "move up");
+        gameView.getInputMap(CONDITION).put(KeyStroke.getKeyStroke("A"), "move left");
+        gameView.getInputMap(CONDITION).put(KeyStroke.getKeyStroke("S"), "move down");
+        gameView.getInputMap(CONDITION).put(KeyStroke.getKeyStroke("D"), "move right");
+
+        gameView.getActionMap().put("move up", new MoveAction(Snake.SnakeDirection.UP));
+        gameView.getActionMap().put("move left", new MoveAction(Snake.SnakeDirection.LEFT));
+        gameView.getActionMap().put("move down", new MoveAction(Snake.SnakeDirection.DOWN));
+        gameView.getActionMap().put("move right", new MoveAction(Snake.SnakeDirection.RIGHT));
+    }
     private class MoveAction extends AbstractAction
     {