Java捕獲窗口狀態事件

Java捕獲窗口狀態事件：

1. package com.han;  
2.   
3. import java.awt.Frame;  
4. import java.awt.event.WindowEvent;  
5. import java.awt.event.WindowStateListener;  
6.   
7. import javax.swing.JFrame;  
8.   
9. /** 
10.  * 捕獲窗口狀態事件 
11.  * @author HAN 
12.  * 
13.  */  
14. public class WindowEvent_2 extends JFrame {  
15.   
16.     /** 
17.      *  
18.      */  
19.     private static final long serialVersionUID = -2809729177140674307L;  
20.   
21.     public WindowEvent_2() {  
22.         // TODO Auto-generated constructor stub   
23.         addWindowStateListener(new WindowStateListener() {  
24.   
25.             @Override  
26.             public void windowStateChanged(WindowEvent e) {  
27.                 // TODO Auto-generated method stub   
28.                 int oldState = e.getOldState();  
29.                 int newState = e.getNewState();  
30.                 String from = null;  
31.                 String to;  
32.                 switch (oldState) {  
33.                 case Frame.NORMAL:  
34.                     from = "正常化";  
35.                     break;  
36.                 case Frame.MAXIMIZED_BOTH:  
37.                     from = "最大化";  
38.                     break;  
39.                 case Frame.ICONIFIED:  
40.                     from = "圖標化";  
41.                     break;  
42.                 }  
43.                 switch (newState) {  
44.                 case Frame.NORMAL:  
45.                     to = "正常化";  
46.                     break;  
47.                 case Frame.MAXIMIZED_BOTH:  
48.                     to = "最大化";  
49.                     break;  
50.                 default:  
51.                     to = "圖標化";  
52.                     break;  
53.                 }  
54.                 System.out.println(from + "---->" + to);  
55.             }  
56.               
57.         });  
58.     }  
59.   
60.     /** 
61.      * @param args 
62.      */  
63.     public static void main(String[] args) {  
64.         // TODO Auto-generated method stub   
65.         WindowEvent_2 frame = new WindowEvent_2();  
66.         frame.setTitle("捕獲窗口狀態事件");  
67.         frame.setVisible(true);  
68.         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
69.         frame.setBounds(0, 0, 300, 100);  
70.     }  
71.   
72. }