问重置游戏循环/重启游戏java swing

EN

/*
     * Main class, game loop, keyListener etc
     */

    /*
     * Here is my run method with game loop when gameOver, snake will no longer
     * update.
     * 
     */
    @Override
    public void run() {
        // game loop
        while (running) {
            if (!gameOver) {                
                update();
            }

            MainFrame.paint();

            try {
                Thread.sleep(60);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

/*
 * KeyListener, when ENTER is pressed call resetGame() method.
 */
if(key.getKeyCode()==KeyEvent.VK_ENTER && gameOver) {
    resetGame();
}


    /*
     * resetGame method where I reset variables, create new default snake, 
     * clear JPanels etc.
     */
    public void resetGame() {
        score = 0;
        snake.clear(); // clear arraylist

        // .removAll() on both JPanels
        MainFrame.clear();

        // fields
        gameOver = false;
        newGame = true;

        direction = Direction.RIGHT;

        // create default snake
        snake = new ArrayList<Point>();
        size = 5;
        for (int i = 0; i < size; i++) {
            snake.add(new Point((size - i - 1) * MainFrame.getTileSize(), 0));
        }
        System.out.println(snake);

        // create apple and set to random location
        apple = randomApple();
    }

    /*
     * MainFrame extends JFrame  
     * methods for repainting and clearing JPanels
     */

    public static void paint() {

        gamePanel.repaint();
        sideHud.repaint();
    }

    public static void clear() {
        gamePanel.removeAll();
        sideHud.removeAll();

        paint();
    }