TestWindowClose匿名内部类实现Adapter

import java.awt.*;import java.awt.event.*;public class TestWindowClose {  public static void main(String args[]) {    new MyFrame55("MyFrame");  }}class MyFrame55 extends Frame {  MyFrame55(String s) {    super(s);    setLayout(null);    setBounds(300, 300, 400, 300);    this.setBackground(new Color(204, 204, 255));    setVisible(true);    //this.addWindowListener(new MyWindowMonitor());    this.addWindowListener(    new WindowAdapter() {      public void windowClosing(WindowEvent e) {        setVisible(false);        System.exit(-1);      }    });  }  /*  class MyWindowMonitor extends WindowAdapter {    public void windowClosing(WindowEvent e) {        setVisible(false);        System.exit(0);    }  }  */}