如何在JPanel中添加一个背景图片，月简单越好

怎么在JPanel中添加一个背景图片，月简单越好
大家好，请问怎么在JPanel中添加一个北京图片，越简单越好。

[解决办法]
好像没有直接的办法, 继承JPanel实现一个BgImagePanel吧, 要不了多少代码
[解决办法]
使用 SwingX 提供的 JXPanel ＋ ImagePainter
[解决办法]
重写paint方法。里面去drawImage(...)
此方法文档上有详细描述。
[解决办法]
public void paintComponent(Graphics g)
{
super.paintComponent(g);
g.drawImage(image,0,0,this);
}
[解决办法]
public class PrintImage extends Frame{
/**
* 
*/
private static final long serialVersionUID = 1564025218977273340L;
/**
* 读取网页图片
*/
private ImageIcon img;
public void paint(Graphics g){
g.drawImage(img.getImage(), 20, 20, this);//显示图像
}
public void processWindowsEvent(WindowEvent e){
//处理windows窗口事件
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING){
System.exit(0);
}
}
public static void main(String[] args) throws IOException{
String path = "F:\\m_1259201088627.jpg";
PrintImage urlt = new PrintImage();
urlt.img = new ImageIcon(path);
urlt.enableEvents(AWTEvent.WINDOW_EVENT_MASK);
urlt.setSize(600,600);//设定窗口的大小
urlt.setVisible(true);//Shows or hides this Window depending on the value of parameter
}
}
[解决办法]

Java code

/** * <br>Created on 2010-11-11 * @author Alex.Huang */package ext.test.jws.gui;import java.awt.Color;import java.awt.Graphics;import java.awt.Image;import java.awt.Toolkit;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;/** * <br>Created on 2010-11-11 * @author Alex.Huang */public class PanelImageTest extends JPanel {   private Image image;   public PanelImageTest() {      super();      setOpaque(true);      image = Toolkit.getDefaultToolkit().getImage( "D:/My Document/My Pictures/Wallpaper Images/NOAA/line0053.jpg"); ;   }   public void paintComponent(Graphics g) {      super.paintComponent(g);      setBackground(Color.WHITE);      if (image != null) {         int height = image.getHeight(this);         int width = image.getWidth(this);         if (height != -1 && height > getHeight())            height = getHeight();         if (width != -1 && width > getWidth())            width = getWidth();         int x = (int) (((double) (getWidth() - width)) / 2.0);         int y = (int) (((double) (getHeight() - height)) / 2.0);         g.drawImage(image, x, y, width, height, this);      }   }      public static void main(String[] args) {      JFrame frame=new JFrame();      PanelImageTest panel=new PanelImageTest();      JButton b=new JButton("按钮");      panel.add(b);      frame.add(panel);      frame.setVisible(true);   }}
[解决办法]
Java code
import java.awt.Graphics;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;public class Background extends JFrame{    ImageIcon image;    JLabel imageLabel;    JPanel backgroundPane;    public Background() {        image = new ImageIcon(Background.class.getClassLoader().getResource("images/background.gif"));        backgroundPane = new JPanel();        imageLabel = new JLabel(image);        backgroundPane.add(imageLabel);        this.add(backgroundPane);        this.setBounds(200, 300, 381, 330);        this.setVisible(true);        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    }        public void paint(Graphics g) {        g.drawImage(image.getImage(), 0, 20, this);    }        public static void main(String[] args) {        Background bg = new Background();    }    } 
 
[解决办法]
Java code
import java.awt.Graphics;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;public class Background extends JFrame {    ImageIcon image;    public Background() {        image = new ImageIcon(Background.class.getClassLoader().getResource(                "images/background.gif"));        this.setBounds(200, 300, 381, 330);        this.setVisible(true);        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    }    public void paint(Graphics g) {        g.drawImage(image.getImage(), 0, 20, this);    }    public static void main(String[] args) {        Background bg = new Background();    }}