Snooker

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;

@SuppressWarnings({ "serial", "unused" })
public class Snooker extends AnimationPanel {
    private static final float BALL_SPEED = 150;
    private static final int BALL_SIZE = 20;
    private static final int MIN_X = 20;
    private static final int MIN_Y = 22;
    private static final int MAX_X = 461 - BALL_SIZE;
    private static final int MAX_Y = 248 - BALL_SIZE;
    private static final float EPSILON = 0.0001f;
    private BufferedImage table;
    private BufferedImage table2;
    private float x, y;
    private int faktor, faktor2;

    public Snooker() {
        setBackground(Color.WHITE);
        try {
            table = ImageIO.read(getClass().getResource("table.png"));
            table2 = new BufferedImage(table.getWidth(), table.getHeight(),
                    BufferedImage.TYPE_INT_RGB);
        } catch (Exception ex) {
            ex.printStackTrace();
            System.exit(-1);
        }
    }

    @Override
    public boolean step(double elapsedTime) {
        x += elapsedTime * BALL_SPEED * faktor;
        y += elapsedTime * BALL_SPEED * faktor2;

        if (x > MAX_X)
            faktor = -1;
        if (x < MIN_X)
            faktor = 1;

        if (y > MAX_Y)
            faktor2 = -1;
        if (y < MIN_Y)
            faktor2 = 1;
        return true;
    }

    @Override
    public void paintComponent(Graphics g) {
        Graphics gTable = table2.createGraphics();
        gTable.drawImage(table, 0, 0, null);
        gTable.setColor(Color.RED);
        gTable.fillOval((int) x, (int) y, BALL_SIZE, BALL_SIZE);
        int x = (getWidth() - table.getWidth()) / 2;
        int y = (getHeight() - table.getHeight()) / 2;
        g.drawImage(table2, x, y, null);
    }

    public static void main(String[] args) {
        new Snooker().run(640, 480, "Snooker", true);
    }
}