在jpanel上显示本地磁盘上的图象?

瞎猫都督

请问如何在Jpanel上用Graphics.drawImage()显示本地磁盘上的图象?谢谢

nanase

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Test extends Frame
{

    public Test()
    {
        addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent e)
            {
                dispose();
                System.exit(0);
            }
        });
    }

    public static void main(String args[])
    {
        Test mainFrame = new Test();
        JPanel jpanel=new JPanel();
        Image img = mainFrame.getToolkit().getImage("c:\\bag.png");
        mainFrame.add(jpanel);
        mainFrame.setSize(400, 400);
        mainFrame.setTitle("DrawImage");
        mainFrame.setVisible(true);
        Graphics g = jpanel.getGraphics();
        while (!g.drawImage(img, 100, 100, mainFrame));
        System.out.println("Start Drawing!");
    }
}

瞎猫都督

楼上的兄弟,只能打开png图象吗?我调试过了,不能显示图象.