在Applet中加载图像（＃2）

Question

我的想法是创建一个包含多个按钮的小程序，点击每个按钮会显示不同的图像和背景。但是对于只有一个代码的代码，对于我提出的每个图像都会这样做很乏味。感谢您的投入......

package com.applet.image;

import java.applet.Applet;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.MalformedURLException;

import java.net.URL;


public class AppletWithImage extends Applet implements ActionListener
{
    private static final long serialVersionUID = 1L;
    public static boolean clicked = false;
    /*<applet code="AppletWithImage.class" width = "100" height = "100"></applet>*/
    public void init()
    {
        Button b = new Button();
        b.setLabel("Click Me");
        b.setBounds(0, 0, 20, 20);      
        b.addActionListener(this);
        add(b);

    }

    public void paint(Graphics g)
    {
        if(clicked==true)
        {
            Image i;            
            try {
                URL base = new     URL(getCodeBase().toString().substring(0, getCodeBase().toString().length()-4));


                g.drawString(getCodeBase().toString().substring(0, getCodeBase().toString().length()-4), 10, 10);
                MediaTracker mt = new MediaTracker(this);
                i = getImage(base, "drawable/pic.PNG");
                mt.addImage(i, 0);
                g.drawImage(i, 20, 20, this);

            }
            catch (MalformedURLException e) 
            {
            } 
            clicked = false;
        }
    }

    @Override
    public void actionPerformed(ActionEvent arg0) 
    {
        clicked = true;
        paint(this.getGraphics());
    }


}