import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Color;

/*
<applet code="ThreadTest5.class" codebase="class" width="150" height="150">
</applet>
*/

public class ThreadTest5 extends Applet implements Runnable{

    Thread thread = null;
    int x, y;
    Color col;

    public void init(){
        x = 10;
        y = 10;
        col = new Color(255, 0 ,0);

        thread = new Thread(this);
        thread.start();
    }

    public void update(Graphics g){
        paint(g);
    }

    public void paint(Graphics g){
        g.setColor(col);
        g.drawOval(x, y, 50, 50);
    }

    public void run(){
        while(true){
            x = (int)(Math.random() * 100);
            y = (int)(Math.random() * 100);

            int red = (int)(Math.random() * 255);
            int green = (int)(Math.random() * 255);
            int blue = (int)(Math.random() * 255);
            col = new Color(red, green, blue);

            repaint();

            /* 500ミリ秒待機する */
            try{
                Thread.sleep(500);
            }catch (InterruptedException e){
            }

        }
    }

}