whirl2.java

由于想一次上传成功 所以将二个教程打包成了一个 这些例子几乎包含了所有java的框架集合

import java.awt.*;
import java.applet.Applet;

/*
<APPLET
    CODE = whirl2.class
    WIDTH = 300
    HEIGHT = 300 >
</APPLET>
*/

public class whirl2 extends Applet implements Runnable
{
    Image whirlImages[] = new Image[4];
    Image nowImage; 
    int whirlIndex = 0;
    Thread whirlThread;
    boolean animateFlag = true;

    public void init() {
        whirlImages[0] = getImage(getCodeBase(), "whirl1.gif");
        whirlImages[1] = getImage(getCodeBase(), "whirl2.gif");
        whirlImages[2] = getImage(getCodeBase(), "whirl3.gif");
        whirlImages[3] = getImage(getCodeBase(), "whirl4.gif");
    }

    public void start() {
        whirlThread = new Thread(this);
        whirlThread.start();
    }

    public void stop() {
        animateFlag = false;
    }

    public void run() {
        while(animateFlag){
            nowImage = whirlImages[whirlIndex++];
            if(whirlIndex > 3)whirlIndex = 0;
            repaint();
            try {Thread.sleep(200);}
            catch(InterruptedException e) { }
        }
    }

    public void paint (Graphics g) 
    {
        if(nowImage != null) g.drawImage(nowImage, 10, 10, this);
    }

    public void update(Graphics g) 
    {
        g.clipRect(10, 10, 280, 280);
        paint(g);
    }
}