4、Swing在JPanel中添加背景图片方法

 1 package com.tntxia.commonswing.panel;  
 2   
 3 import java.awt.*;  
 4 import javax.swing.JPanel;  
 5   
 6 /** 
 7  * 有背景图片的Panel类 
 8  * @author tntxia 
 9  * 
10  */  
11 public class BackgroundPanel extends JPanel {  
12       
13     /** 
14      *  
15      */  
16     private static final long serialVersionUID = -6352788025440244338L;  
17       
18     private Image image = null;  
19   
20     public BackgroundPanel(Image image) {  
21         this.image = image;  
22     }  
23   
24     // 固定背景图片，允许这个JPanel可以在图片上添加其他组件  
25     protected void paintComponent(Graphics g) {  
26         g.drawImage(image, 0, 0, this.getWidth(), this.getHeight(), this);  
27     }  
28 }  

1 Image image=new ImageIcon("images/bg.gif").getImage();  
2 JPanel panel = new BackgroundPanel(image);