心形图java代码

【java源代码】

import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Image; 
import java.awt.Toolkit; 
import javax.swing.JFrame; 
 
@SuppressWarnings("serial") 
public class Demo extends JFrame implements Runnable { 
 
    // 定义加载窗口大小 
    public static final int GAME_WIDTH = 500; 
    public static final int GAME_HEIGHT = 500; 
    // 获取屏幕窗口大小 
    public static final int WIDTH = Toolkit.getDefaultToolkit() 
            .getScreenSize().width; 
    public static final int HEIGHT = Toolkit.getDefaultToolkit() 
            .getScreenSize().height; 
 
    public Demo() { 
        // 设置窗口标题 
        this.setTitle("心形曲线"); 
        // 设置窗口初始位置 
        this.setLocation((WIDTH - GAME_WIDTH) / 2, (HEIGHT - GAME_HEIGHT) / 2); 
        // 设置窗口大小 
        this.setSize(GAME_WIDTH, GAME_HEIGHT); 
        // 设置背景色 
        this.setBackground(Color.BLACK); 
        // 设置窗口关闭方式 
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
        // 设置窗口显示 
        this.setVisible(true); 
    } 
 
    @Override 
    public void paint(Graphics g) { 
         
        double x, y, r; 
        Image OffScreen = createImage(GAME_WIDTH, GAME_HEIGHT); 
        Graphics drawOffScreen = OffScreen.getGraphics(); 
 
        for (int i = 0; i < 90; i++) { 
            for (int j = 0; j < 90; j++) { 
                r = Math.PI / 45 * i * (1 - Math.sin(Math.PI / 45 * j)) * 18;