Java捕获窗口焦点事件

Java捕获窗口焦点事件

Java捕获窗口焦点事件

1. package com.han;  
2.   
3. import java.awt.event.WindowEvent;  
4. import java.awt.event.WindowFocusListener;  
5.   
6. import javax.swing.JFrame;  
7.   
8. /** 
9.  * 捕获窗口焦点事件 
10.  * @author HAN 
11.  * 
12.  */  
13. public class WindowEvent_1 extends JFrame {  
14.   
15.     /** 
16.      *  
17.      */  
18.     private static final long serialVersionUID = 6385933774053272194L;  
19.   
20.     public WindowEvent_1() {  
21.         // TODO Auto-generated constructor stub   
22.         addWindowFocusListener(new WindowFocusListener() {  
23.   
24.             @Override  
25.             public void windowGainedFocus(WindowEvent e) {  
26.                 // TODO Auto-generated method stub   
27.                 System.out.println("窗口获得了焦点！");  
28.             }  
29.   
30.             @Override  
31.             public void windowLostFocus(WindowEvent e) {  
32.                 // TODO Auto-generated method stub   
33.                 System.out.println("窗口失去了焦点！");  
34.             }  
35.               
36.         });  
37.     }  
38.   
39.     /** 
40.      * @param args 
41.      */  
42.     public static void main(String[] args) {  
43.         // TODO Auto-generated method stub   
44.         WindowEvent_1 frame = new WindowEvent_1();  
45.         frame.setTitle("捕获窗口焦点事件");  
46.         frame.setVisible(true);  
47.         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
48.         frame.setBounds(0, 0, 300, 100);  
49.     }  
50.   
51. }