Java-Quelltext

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.activity.InvalidActivityException;

public class Snake extends Applet implements Runnable {
	int sizeLevel1 = 4, size = sizeLevel1, maxsize=50;
	Random r=new Random(System.currentTimeMillis());
	Point[] snaky = new Point[maxsize];
	int zoom = 10, delay = 200;
	int headx = zoom, heady = zoom, sizex = 40, sizey = 40, lives = 3;

	int numberx,numbery,number=1;
	char dir = 'd';
	Color wall = Color.black, snak = Color.green, ground = Color.lightGray,
			cnumber = Color.yellow, text = Color.red;
	public void start() {
		super.start();
		addKeyListener(new KeyAdapter() {public void keyPressed(KeyEvent e) {dir = e.getKeyChar();}});
		new Thread(this, "Time").start();
		numberx=r.nextInt(sizex-2)*zoom+zoom;
		numbery=r.nextInt(sizex-2)*zoom+zoom;
	}

	public void paint(Graphics g) {
		g.setColor(wall);
		g.fillRect(0, 0, zoom * sizex, zoom * sizey);
		g.setColor(ground);
		g.fillRect(zoom, zoom, sizex * zoom - 2*zoom, sizey * zoom - 2*zoom);
	}

	public void render(Graphics g) throws InvalidActivityException {
		if (headx + 1 < zoom | heady + 1 < zoom
				| headx + 1 > zoom * sizex - zoom
				| heady + 1 > zoom * sizey - zoom)
			throw new InvalidActivityException();

		if(headx==numberx & heady==numbery){
			size+=4;
			numberx=r.nextInt(sizex-2)*zoom+zoom;
			numbery=r.nextInt(sizex-2)*zoom+zoom;
			number++;
		}
		g.setColor(ground);
		if (snaky[size] != null)g.fillRect(snaky[size].x, snaky[size].y, zoom, zoom);
		g.setColor(snak);
		if (snaky[0] != null)g.fillRect(snaky[0].x, snaky[0].y, zoom, zoom);
		g.setColor(cnumber);
		if (snaky[0] != null)g.drawString(""+number,numberx,numbery + size );
		g.setColor(text);
		if (dir == 'q')g.drawString("Finish! Your Skill: " + size * delay, 100, 100);
	}

	@Override
	public void run() {
		while (dir != 'q') {
			try {
				Thread.sleep(delay);
				if (dir == 'd')headx += zoom;
				if (dir == 's')heady += zoom;
				if (dir == 'a')headx -= zoom;
				if (dir == 'w')heady -= zoom;
				for (int i = size; i > 0;)
					snaky[i] = snaky[--i];
				snaky[0] = new Point(headx,heady);
				render(getGraphics());
			} catch (InterruptedException e) {
				dir = 'q';
			} catch (InvalidActivityException ise) {
				lives--;
				if (lives == 0)
					dir = 'q';
				else {
					getGraphics().drawString(
							"Wall collision! Life's left:" + lives, 100, 100);
					dir = 'p';
					snaky = new Point[maxsize];
					try {Thread.sleep(3000);} catch (Exception e) {}
					headx = zoom;
					heady = zoom;
					repaint();
				}
			}
		}
	}
}