用Java语言编写生成心形图案的函数

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

public class HeartPattern extends JFrame {

    public HeartPattern() {
       setTitle("Heart Pattern");
       setSize(500, 500);
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       setLocationRelativeTo(null);
   }

    public void paint(Graphics g) {
       super.paint(g);
       Graphics2D g2d = (Graphics2D) g;

       g2d.setColor(Color.RED);
       g2d.setStroke(new BasicStroke(3));

       int x = getWidth() / 2;
       int y = getHeight() / 2;

       int radius = 100;

       // 绘制左半部分的心形
       for (int i = -radius; i <= 0; i++) {
           double y1 = Math.sqrt(radius * radius - i * i);
           g2d.drawLine(x + i, y - (int) y1, x + i, y + (int) y1);
       }

       // 绘制右半部分的心形
       for (int i = radius; i >= 0; i--) {
           double y1 = Math.sqrt(radius * radius - i * i);
           g2d.drawLine(x + i, y - (int) y1, x + i, y + (int) y1);
       }
   }

    public static void main(String[] args) {
       HeartPattern hp = new HeartPattern();
       hp.setVisible(true);
   }
}