Implement GameLister as common class.

src/main/java/lab/GameController.java

@@ -40,6 +40,7 @@ public class GameController {
 		
 		strengthSlider.valueProperty().addListener(this::strenghtChanged);
 		world.setCannonStrength(strengthSlider.getValue());
+		world.setGameListener(new GameListenerImpl(this));
 		animationTimer.start();
 	}
 
@@ -63,4 +64,12 @@ public class GameController {
 			, Number oldValue, Number newValue) {
 		world.setCannonStrength(newValue.doubleValue());
 	}
+
+	public void setShoots(int shoots) {
+		this.shoots.setText(""+shoots);
+	}
+
+	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
+
+	}
+
+}

src/main/java/lab/World.java

@@ -115,4 +115,8 @@ public class World {
 		}
 	}
 
+	public void setGameListener(GameListenerImpl gameListener) {
+		this.gameListener = gameListener;
+	}
+
 }