2025跨年烟花代码java

### Java 2025新年烟花动画代码实例

为了实现Java环境下的2025新年烟花效果，通常会采用图形界面库如Swing或JavaFX。下面提供了一个基于Java Swing的简单烟花爆炸模拟程序：

import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.List;

public class FireworksAnimation extends JPanel {

    private List<Firework> fireworks = new ArrayList<>();

    public FireworksAnimation() {
        setPreferredSize(new Dimension(800, 600));
        setBackground(Color.BLACK);
        Timer timer = new Timer(30, e -> repaint());
        timer.start();
        
        // 模拟每隔一段时间发射新的烟花
        Thread thread = new Thread(() -> {
            while (true) {
                try {
                    Thread.sleep((long)(Math.random() * 1000 + 500)); // 随机间隔时间
                    addNewFirework();
                } catch (InterruptedException ex) {}
            }
        });
        thread.start();
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D)g.create();

        for(Firework f : fireworks){
            f.draw(g2d);    
        }
        updateFireworks();  
        g2d.dispose();
    }

    private synchronized void addNewFirework(){
        int x = (int)(Math.random()*getWidth());
        fireworks.add(new Firework(x, getHeight()));
    }

    private synchronized void updateFireworks(){
        List<Firework> toRemove = new ArrayList<>();
        for(int i=0; i<fireworks.size(); ++i){
            if(fireworks.get(i).update()){
                toRemove.add(fireworks.get(i));
            }
        }
        fireworks.removeAll(toRemove);
    }

    static class Firework{
        private final Color color;
        private double x,y,vx,vy,radius,alpha;

        public Firework(double startX,double startY){
            this.color = new Color(
                (float)Math.random(),
                (float)Math.random(), 
                (float)Math.random()
            );
            this.x=startX;
            this.y=startY-(startY* Math.random())/2;
            this.vx=(Math.random()-0.5)*7;
            this.vy=-Math.sqrt(Math.abs(startY-x))*0.9-Math.random()*4-2;
            this.radius=Math.random()*3+1;
            this.alpha=1f;
        }

        boolean update(){
            vy+=0.1;
            y+=vy;
            x+=vx;
            alpha-=0.01;
            return alpha<=0 || y>=getHeight();
        }

        void draw(Graphics2D g2d){
            Composite originalComposite=g2d.getComposite();
            AlphaComposite ac=AlphaComposite.getInstance(
                AlphaComposite.SRC_OVER,
                (float)alpha
            );
            g2d.setComposite(ac);

            g2d.setColor(color);
            g2d.fillOval((int)x-radius,(int)y-radius,2*(int)radius,2*(int)radius);

            g2d.setComposite(originalComposite);
        }
    }

    public static void main(String[] args) {
        JFrame frame=new JFrame("Happy New Year 2025!");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(new FireworksAnimation());
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

这段代码创建了一个窗口，在其中随机位置不断生成并渲染烟花粒子的效果[^1]。