GameListener implemented as inner class

src/main/java/lab/GameController.java

@@ -40,7 +40,7 @@ public class GameController {
 		
 		strengthSlider.valueProperty().addListener(this::strenghtChanged);
 		world.setCannonStrength(strengthSlider.getValue());
-		world.setGameListener(new GameListenerImpl(this));
+		world.setGameListener(new GameListenerImpl());
 		animationTimer.start();
 	}
 
@@ -65,11 +65,21 @@ public class GameController {
 		world.setCannonStrength(newValue.doubleValue());
 	}
 
-	public void setShoots(int shoots) {
-		this.shoots.setText(""+shoots);
-	}
+	
+	private class GameListenerImpl implements GameListener {
+
+		
+		@Override
+		public void stateChanged(int shoots, int hits) {
+			GameController.this.shoots.setText("" + shoots);
+			GameController.this.hits.setText("" + hits);
+		}
+
+		@Override
+		public void gameOver() {
+			// TODO Auto-generated method stub
+
+		}
 
-	public void setHits(int hits) {
-		this.hits.setText("" + hits);
 	}
 }

src/main/java/lab/GameListenerImpl.java

-package lab;
-
-public class GameListenerImpl implements GameListener {
-
-	
-	
-	
-	private final GameController controller;
-	
-	public GameListenerImpl(GameController controller) {
-		this.controller = controller;
-	}
-
-	@Override
-	public void stateChanged(int shoots, int hits) {
-		controller.setHits(hits);
-		controller.setShoots(shoots);
-	}
-
-	@Override
-	public void gameOver() {
-		// TODO Auto-generated method stub
-
-	}
-
-}