Window窗口事件

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.addWindowListener(new WindowAdapter() {
        public void windowOpened(WindowEvent e) {
                System.out.println("你好,明天!");
        }
        @Override
        public void windowClosing(WindowEvent e) {
            System.out.println("window关闭");
            System.exit(0);
        }
        @Override
        public void windowClosed(WindowEvent e) {
            System.out.println("window正在关闭");
        }
    });