Java画会跳动的爱心

以下是Java代码，可以画出跳动的爱心：

import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Heart extends JPanel implements Runnable {

    private static final long serialVersionUID = 1L;

    private static final int WIDTH = 600;  // 窗口宽度
    private static final int HEIGHT = 600; // 窗口高度

    private int x; // x坐标
    private int y; // y坐标
    private double t; // 参数t

    public Heart() {
        x = 300;
        y = 100;
        t = 0;
    }

    public void paint(Graphics g) {
        super.paint(g);
        g.setColor(Color.RED);
        for (int i = 0; i < 360; i++) {
            double r = Math.PI * i / 180;
            double x = 16 * Math.pow(Math.sin(r), 3);
            double y = 13 * Math.cos(r) - 5 * Math.cos(2 * r) - 2 * Math.cos(3 * r) - Math.cos(4 * r);
            g.drawLine((int) x + this.x, (int) y + this.y, (int) x + this.x, (int) y + this.y);
        }
    }

    public void run() {
        while (true) {
            t += 0.05;
            x = (int) (150 * (16 * Math.pow(Math.sin(t), 3)));
            y = (int) (150 * (13 * Math.cos(t) - 5 * Math.cos(2 * t) - 2 * Math.cos(3 * t) - Math.cos(4 * t)));
            repaint();
            try {
                Thread.sleep(30);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

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

}

该程序创建了一个JFrame窗口，在窗口中画出了一个跳动的爱心。程序使用了数学函数来计算爱心的坐标，并通过不断更新坐标来实现跳动效果。