java新年快乐烟花

以下是一个使用Java Swing实现的简单祝福烟花效果的代码示例：

import javax.swing.*;
import java.awt.*;
import java.util.Random;

public class Fireworks extends JFrame {
    private static final int WIDTH = 800;
    private static final int HEIGHT = 600;
    private static final int NUM_FIREWORKS = 10;

    private Firework[] fireworks;

    public Fireworks() {
        setTitle("New Year Fireworks");
        setSize(WIDTH, HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);
        setLocationRelativeTo(null);

        fireworks = new Firework[NUM_FIREWORKS];
        for (int i = 0; i < NUM_FIREWORKS; i++) {
            fireworks[i] = new Firework();
        }

        setVisible(true);
    }

    @Override
    public void paint(Graphics g) {
        super.paint(g);

        for (Firework firework : fireworks) {
            firework.draw(g);
        }
    }

    private class Firework {
        private static final int MAX_PARTICLES = 100;
        private static final int MAX_VELOCITY = 5;
        private static final int MAX_RADIUS = 10;

        private int x;
        private int y;
        private int radius;
        private Color color;
        private Particle[] particles;

        public Firework() {
            Random random = new Random();
            x = random.nextInt(WIDTH);
            y = random.nextInt(HEIGHT);
            radius = random.nextInt(MAX_RADIUS) + 1;
            color = new Color(random.nextInt(256), random.nextInt(256), random.nextInt(256));

            particles = new Particle[MAX_PARTICLES];
            for (int i = 0; i < MAX_PARTICLES; i++) {
                particles[i] = new Particle();
            }
        }

        public void draw(Graphics g) {
            g.setColor(color);
            g.fillOval(x - radius, y - radius, 2 * radius, 2 * radius);

            for (Particle particle : particles) {
                particle.update();
                particle.draw(g);
            }
        }

        private class Particle {
            private int x;
            private int y;
            private int velocityX;
            private int velocityY;
            private int radius;

            public Particle() {
                Random random = new Random();
                x = Firework.this.x;
                y = Firework.this.y;
                velocityX = random.nextInt(2 * MAX_VELOCITY + 1) - MAX_VELOCITY;
                velocityY = random.nextInt(2 * MAX_VELOCITY + 1) - MAX_VELOCITY;
                radius = random.nextInt(MAX_RADIUS) + 1;
            }

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

            public void draw(Graphics g) {
                g.setColor(color);
                g.fillOval(x - radius, y - radius, 2 * radius, 2 * radius);
            }
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(Fireworks::new);
    }
}

这段代码使用Java Swing库绘制了一个简单的祝福烟花效果。它创建了一个窗口，并在窗口中绘制了多个烟花。每个烟花由一个中心点和多个粒子组成，粒子在窗口中随机移动，形成烟花效果。