Java捕获其他窗口事件



package com.han;

import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import javax.swing.JFrame;

/**
* 捕获其他窗口事件
* @author HAN
*
*/
public class WindowEvent_3 extends JFrame {

/**
*
*/
private static final long serialVersionUID = 9040264048222645786L;

public WindowEvent_3() {
// TODO Auto-generated constructor stub
addWindowListener(new WindowListener() {

@Override
public void windowOpened(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口被打开！");
}

@Override
public void windowClosing(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口将要被关闭！");
}

@Override
public void windowClosed(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口已经被关闭！");
}

@Override
public void windowIconified(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口被图标化！");
}

@Override
public void windowDeiconified(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口被非图标化！");
}

@Override
public void windowActivated(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口被激活！");
}

@Override
public void windowDeactivated(WindowEvent e) {
// TODO Auto-generated method stub
System.out.println("窗口不再处于激活状态！");
}

});
}

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
WindowEvent_3 frame = new WindowEvent_3();
frame.setTitle("捕获其他窗口事件");www.
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setBounds(0, 0, 300, 100);
}

}

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我是初学者，看不懂,路过