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

/*
<applet code="ThreadTest7.class" codebase="class" width="150" height="150">
</applet>
*/

public class ThreadTest7 extends Applet implements Runnable{

    Thread thread = null;
    int x;
    Dimension size;
    Image back;
    Graphics buffer;

    public void init(){
        x = 10;

        size = getSize();
        back = createImage(size.width, size.height);
        buffer = back.getGraphics();

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

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

    public void paint(Graphics g){
        buffer.setColor(getBackground());
        buffer.fillRect(0, 0, size.width, size.height);

        for (int j = 0 ; j < 100 ; j++){
            for (int i = 0 ; i < 255 ; i++){
                buffer.setColor(new Color(i, 0, 0));
                buffer.drawLine(x + i, 10, x + i, 265);
            }

            for (int i = 0 ; i < 127 ; i++){
                buffer.setColor(new Color(0, 0, i * 2));
                buffer.drawLine(x, 10 + i * 2, x + 255, 10 + i * 2);
            }
        }

        g.drawImage(back, 0, 0, this);
    }

    public void run(){
        while(true){
            x += 1;
            if (x >= 100){
                x = 10;
            }

            repaint();

            /* 200ミリ秒待機する */
            try{
                Thread.sleep(200);
            }catch (InterruptedException e){
            }

        }
    }

}