程序心形曲线绘制_java输出心形图案

代码如下：

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;

x = r * Math.cos(Math.PI / 45 * j) * Math.sin(Math.PI / 45 * i)

+ GAME_WIDTH / 2;

y = -r * Math.sin(Math.PI / 45 * j) + GAME_HEIGHT / 4;

//设置画笔颜色

drawOffScreen.setColor(Color.PINK);

// 绘制椭圆

drawOffScreen.fillOval((int) x, (int) y, 2, 2);

}

// 生成图片

g.drawImage(OffScreen, 0, 0, this);

}

}

public static void main(String[] args) {

Demo demo = new Demo();

Thread t = new Thread(demo);

t.start();

}

@Override

public void run() {

while (true) {

try {

Thread.sleep(2000);

this.repaint();

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}

效果图：