爱心图形 | 易学教程

话不多说,上代码

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

import javax.swing.JFrame;

@SuppressWarnings("serial")
class Cardioid extends JFrame {
   // 定义窗口大小
   private static final int WIDTH = 480;
   private static final int HEIGHT = 600;

   // 获取屏幕大小
   private static int WINDOW_WIDTH = Toolkit.getDefaultToolkit()
           .getScreenSize().width;
   private static int WINDOW_HEIGHT = Toolkit.getDefaultToolkit()
           .getScreenSize().height;

   // 构造函数
   public Cardioid() {
       // 设置窗口标题
       super("❤形线");
       // 设置背景色
       this.setBackground(Color.BLACK);
       // 设置窗口位置
       this.setLocation((WINDOW_WIDTH - WIDTH) / 2,
               (WINDOW_HEIGHT - HEIGHT) / 2);
       // 设置窗口大小
       this.setSize(WIDTH, HEIGHT);
       // 设置窗口布局
       this.setLayout(getLayout());
       // 设置窗口可见
       this.setVisible(true);
       // 设置窗口默认关闭方式
       this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
   }

public void paint(Graphics g) {

       double x, y, r; // 横纵坐标及半径
       Image image = this.createImage(WIDTH, HEIGHT);
       Graphics pic = image.getGraphics();

       // 绘制图形
       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);
           }
           // 生成图片
           g.drawImage(image, 0, 0, this);

}

public static void main(String[] args) {

new Cardioid();
}

}

--------------------------------------------------------

还有一个简单的

import java.awt.Graphics;

import javax.swing.JApplet;
/**
*
* @author LuckyPig
*/
public class Love extends JApplet {
   public void paint(Graphics page)
   {
       double x, y, t;
       page.drawString("I love you !", 275, 60);

       for(y = 2; y >= -2; y -= 0.005)
           for(x = -200; x <= 200; x += 0.005)
           {
               t = x*x + y*y - 1;
               if(t*t*t + x*x*y*y*y <= 0)
                   page.drawOval((int)(x*200+300), (int)(y*200+300), 0, 0);
           }

   }
}

来源：oschina

链接：https://my.oschina.net/u/3709014/blog/1836426

标签

magenta

awt

swing

java

jframe