请教一个问题,看了汤阳光老师的视频(贪吃蛇)有个问题一直没解决!

Question

请教一个问题,看了汤阳光老师的视频(贪吃蛇)有个问题一直没解决!
public void dispaly(Snake snake,Food food, Ground ground)
{  System.out.println("GamePanel's dispaly");
this.snake = snake;
this.food = food;
this.ground = ground;
this.repaint();
   System.out.println("GamePanel's dis"); }
//@Override 
protected void printComponent(Graphics g) 
{  super.paintComponent(g);
this.ground.drawMe(); 
this.snake.drawMe(); 
this.food.drawMe();
System.out.println("GamePanel's d");  }上面这个this.repaint();不调用protected void printComponent(Graphics g) 里面的内容,也就是protected void printComponent(Graphics g) 里面的内容没的执行.