心形曲线

package Test;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;

import javax.swing.JFrame;

public class Love extends JFrame {
    
    private static final int width = 480;
    private static final int height = 600;
    
    private static int window_width = Toolkit.getDefaultToolkit().getScreenSize().width;
    private static int window_height = Toolkit.getDefaultToolkit().getScreenSize().height;

    public Love()
    {
        super("心形线");
        this.setBackground(Color.BLACK);
        this.setLocation((window_width - width) / 2, (window_height - height) / 2);
        this.setSize(width, height);
        this.setLayout(getLayout());
        this.setVisible(true);
        this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    }
    
    public void paint(Graphics g)
    {
        double x, y, r;
        Image image = this.createImage(width, height);
        Graphics pic = image.getGraphics();
        
        for(int i = 0; i < 100; i++)
        {
            for(int j = 0; j < 100; j++)
            {
                r = Math.PI / 45 + Math.PI / 45 * i * (1 - Math.sin(Math.PI / 45 * j)) * 18;
                x = r * Math.cos(Math.PI / 45 * j) * Math.sin(Math.PI / 45 * i) + width / 2;
                y = -r * Math.sin(Math.PI / 45 * j) + height / 2;
                pic.setColor(Color.MAGENTA);
                pic.fillOval((int)x, (int)y, 2, 2);
            }
            g.drawImage(image, 0, 0, this);
        }
    }
    
    public static void main(String[] args) {
        new Love();
    }
}