帮我写一个Java烟花代码

好的，以下是一个简单的Java烟花代码：

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.util.ArrayList;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Firework extends JPanel implements Runnable {

    private static final long serialVersionUID = 1L;
    private static final int WIDTH = 800;
    private static final int HEIGHT = 600;
    private static final int MAX_PARTICLES = 200;
    private static final int GRAVITY = 1;
    private static final int MAX_VELOCITY = 10;
    private static final int MAX_EXPLOSION_RADIUS = 100;
    private static final int MIN_EXPLOSION_RADIUS = 20;
    private static final int MAX_EXPLOSION_PARTICLES = 50;
    private static final int MIN_EXPLOSION_PARTICLES = 10;
    private static final int MAX_FIREWORKS = 10;
    private static final int MIN_FIREWORKS = 5;
    private static final int FIREWORK_DELAY = 100;
    private static final Color[] COLORS = { Color.RED, Color.ORANGE, Color.YELLOW, Color.GREEN, Color.BLUE, Color.MAGENTA };
    private ArrayList<Particle> particles;
    private Point position;
    private int velocity;
    private int explosionRadius;
    private int explosionParticles;
    private Color color;
    private boolean exploded;
    private int fireworksCount;
    private Random random;

    public Firework() {
        particles = new ArrayList<Particle>();
        random = new Random();
        position = new Point(random.nextInt(WIDTH), HEIGHT);
        velocity = random.nextInt(MAX_VELOCITY) + 1;
        explosionRadius = random.nextInt(MAX_EXPLOSION_RADIUS - MIN_EXPLOSION_RADIUS) + MIN_EXPLOSION_RADIUS;
        explosionParticles = random.nextInt(MAX_EXPLOSION_PARTICLES - MIN_EXPLOSION_PARTICLES) + MIN_EXPLOSION_PARTICLES;
        color = COLORS[random.nextInt(COLORS.length)];
        exploded = false;
        fireworksCount = random.nextInt(MAX_FIREWORKS - MIN_FIREWORKS) + MIN_FIREWORKS;
    }

    public void run() {
        try {
            Thread.sleep(FIREWORK_DELAY);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        while (fireworksCount > ) {
            if (!exploded) {
                position.y -= velocity;
                velocity -= GRAVITY;
                if (velocity <= ) {
                    exploded = true;
                    explode();
                }
            } else {
                for (int i = ; i < particles.size(); i++) {
                    Particle p = particles.get(i);
                    p.update();
                    if (p.getRadius() <= ) {
                        particles.remove(i);
                    }
                }
                if (particles.size() == ) {
                    fireworksCount--;
                    reset();
                }
            }
            repaint();
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    private void explode() {
        for (int i = ; i < explosionParticles; i++) {
            particles.add(new Particle(position.x, position.y, explosionRadius, color));
        }
    }

    private void reset() {
        particles.clear();
        position = new Point(random.nextInt(WIDTH), HEIGHT);
        velocity = random.nextInt(MAX_VELOCITY) + 1;
        explosionRadius = random.nextInt(MAX_EXPLOSION_RADIUS - MIN_EXPLOSION_RADIUS) + MIN_EXPLOSION_RADIUS;
        explosionParticles = random.nextInt(MAX_EXPLOSION_PARTICLES - MIN_EXPLOSION_PARTICLES) + MIN_EXPLOSION_PARTICLES;
        color = COLORS[random.nextInt(COLORS.length)];
        exploded = false;
    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        for (int i = ; i < particles.size(); i++) {
            Particle p = particles.get(i);
            g.setColor(p.getColor());
            g.fillOval(p.getX() - p.getRadius(), p.getY() - p.getRadius(), p.getRadius() * 2, p.getRadius() * 2);
        }
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Fireworks");
        frame.setSize(WIDTH, HEIGHT);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Firework fireworks = new Firework();
        frame.add(fireworks);
        frame.setVisible(true);
        new Thread(fireworks).start();
    }

}

class Particle {

    private int x;
    private int y;
    private int radius;
    private Color color;
    private int velocityX;
    private int velocityY;

    public Particle(int x, int y, int radius, Color color) {
        this.x = x;
        this.y = y;
        this.radius = radius;
        this.color = color;
        velocityX = (int) (Math.random() * 20) - 10;
        velocityY = (int) (Math.random() * 20) - 10;
    }

    public void update() {
        x += velocityX;
        y += velocityY;
        radius--;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public int getRadius() {
        return radius;
    }

    public Color getColor() {
        return color;
    }

}