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

public class MultiThread extends Applet implements Runnable {

    Ball ball1, ball2, ball3;
    int w, h;
    Thread drawBall;
    boolean cont = true;

    public void init() {
        w = this.getWidth();
        h = this.getHeight();

        ball1 = new Ball(1, 2, w, h);
        ball1.start();
        ball2 = new Ball(2, 1, w, h);
        ball2.start();
        ball3 = new Ball(3, 2, w, h);
        ball3.start();
        drawBall = new Thread(this);
        drawBall.start();
    }

    public void run() {
        while (cont) {
            try {
                Thread.sleep(50);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            repaint();
        }
    }

    public void paint(Graphics g) {
        ball1.draw(g);
        ball2.draw(g);
        ball3.draw(g);
    }

    public void stop() {
        cont = false;
        ball1.tstop();
        ball2.tstop();
        ball3.tstop();
    }
}