跨年烟花源代码java

### Java 实现跨年烟花效果

为了实现跨年烟花的效果，在Java中可以利用图形界面库Swing来绘制动画。下面是一个简单的例子，通过随机生成不同颜色和位置的圆形模拟烟花爆炸的效果[^1]。

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

public class Fireworks extends JPanel implements Runnable {
    private static final int FRAME_WIDTH = 800;
    private static final int FRAME_HEIGHT = 600;
    private Thread animator;
    private boolean running = false;
    
    public void start() {
        if (animator == null || !running) {
            animator = new Thread(this);
            running = true;
            animator.start();
        }
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        drawFirework((Graphics2D)g.create());
    }

    private void drawFirework(Graphics2D g2d){
        Random random = new Random();
        
        // 设置背景为黑色
        setBackground(Color.BLACK);

        for(int i=0; i<50 ;i++){
            Color color = new Color(random.nextInt(256),random.nextInt(256),random.nextInt(256));
            
            int x = random.nextInt(FRAME_WIDTH);
            int y = random.nextInt(FRAME_HEIGHT);
            
            g2d.setColor(color);
            g2d.fillOval(x, y, 10, 10);   
        }  
    }

    @Override
    public void run(){
        while(running){
            repaint(); 
            try{
                Thread.sleep(100);
            }catch(Exception e){}
        }
    }

    public static void main(String[] args)throws Exception{     
        JFrame frame = new JFrame("New Year's Eve Fireworks");
        Fireworks fireworksPanel = new Fireworks();

        frame.add(fireworksPanel,BorderLayout.CENTER);
        frame.setSize(FRAME_WIDTH,FRAME_HEIGHT);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);

        fireworksPanel.start();
    }
}

这段代码创建了一个名为`Fireworks`的类继承自JPanel并实现了Runnable接口以便启动线程更新画面。程序会持续不断地重绘组件，每次都会随机产生新的彩色圆圈代表绽放中的烟火，从而形成动态变化的画面效果[^1]。