// TestWindowEvent.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
//实现一个框架,同时实现一个窗口事件监听器
public class TestWindowEvent extends JFrame implements WindowListener
{
 // 构造方法
 public TestWindowEvent(String title)
 {
 super(title);
 //注册窗口事件监听器
 addWindowListener(this); 
 }
 //当窗口打开时被调用
 public void windowOpened(WindowEvent event)
 {
 System.out.println("窗口被打开");
 }
 //当窗口还原时被调用
 public void windowDeiconified(WindowEvent event)
 {
 System.out.println("窗口被还原");
 }
 //当窗口最小化时被调用
 public void windowIconified(WindowEvent event)
 {
 System.out.println("窗口被最小化");
 }
 //当窗口激活时被调用
 public void windowActivated(WindowEvent event)
 {
 System.out.println("窗口被激活");
 }
 //当窗口失效时被调用
 public void windowDeactivated(WindowEvent event)
 {
 System.out.println("窗口失效");
 }
 //当窗口正在关闭时被调用
 public void windowClosing(WindowEvent event)
 {
 System.out.println("窗口正在关闭");
 }
 //当窗口已经关闭时被调用
 public void windowClosed(WindowEvent event)
 {
 System.out.println("窗口被关闭");
 }
 //main方法
 public static void main(String[] args)
 {
 TestWindowEvent frame = new TestWindowEvent("TestWindowEvent");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setSize(100, 80);
 frame.setVisible(true);
 }
}