GUI

class YourWindowListern extends WindowAdapter{
    //由于适配器中的方法太简单，不能满足业务的需求所以要对对应的处理方法进行覆盖
    @Override
    public void windowClosing(WindowEvent e) { 
        super.windowClosing(e);
        e.getWindow().dispose();
        System.exit(0);
        /*
         * 如果一个方法不是自己调用，而是由java内部自己调用，如果出现与结果不一致的情况，要查看此方法是否被调用
         * */
    }
}
class MyWindownListern implements WindowListener{
    @Override public void windowOpened(WindowEvent e) {}
    @Override
    public void windowClosing(WindowEvent e) {
        e.getWindow().setVisible(false);  //区别两个get方法
        ((Window) e.getComponent()).dispose();
        //e.get 得到发生事件的事件源
        System.exit(0);
    }
    @Override public void windowClosed(WindowEvent e) {}
    @Override public void windowIconified(WindowEvent e) {}
    @Override public void windowDeiconified(WindowEvent e) {}
    @Override public void windowActivated(WindowEvent e) {}
    @Override public void windowDeactivated(WindowEvent e) {}
}
class ButtonClose implements ActionListener{
    private Frame f = null;
    public ButtonClose(Frame f) {
        this.f = f;
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        this.f.dispose();
        //System.exit(0);
    }
    
}
public class TestFrame {
    public static void main(String[] args) {
        /*Frame f = new Frame("www.cjt.org");
        f.add(new Button("ok"));
        f.setSize(300, 300);
        f.setVisible(true);
    //    f.addWindowListener(new MyWindownListern());  //将事件注册到f对象上
        f.addWindowListener(new YourWindowListern());*/
        /*    try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        f.dispose(); //释放窗口对象
*/        //f.setVisible(false);  //设置不可见但f对象仍然在内存对象中
        
        //3. ButtonClose
        Frame f = new Frame("www.cjt.org");
        f.setSize(300, 200);
        Button b = new Button("close");
        f.add(b);
        f.setVisible(true);
        b.addActionListener(new ButtonClose(f));
    }
}

public class TestFrame implements ActionListener{
    private Frame f = new Frame("www.cjt.org"+i);
    public static int i = 0;
    public TestFrame(){
        i++;
    }
    public void init(){
        Button b = new Button("close");
        f.setSize(300, 200);
        f.add(b);
        f.setVisible(true);
        b.addActionListener(this/*new TestFrame()*/);
    }//面向对象编程思想：脑海中是内存中的一个个对象，通过调用方法之后对象状态发生某种变化
    public static void main(String[] args) {
        TestFrame t = new TestFrame();
        t.init();
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("***"+i);
        f.dispose();
        //System.exit(0);
    }
}