Java实现表白小程序

package ddd; import java.awt.*; import javax.swing.JFrame; public class Cardioid extends JFrame {   //获取屏幕大小   private static final int WIDTH = 500;   private static final int HEIGHT = 500;     private static int WINDOW_WIDTH = Toolkit.getDefaultToolkit().getScreenSize().width;   private static int WINDOW_HEIGHT = Toolkit.getDefaultToolkit().getScreenSize().height;   public Cardioid(){     super("I love you");//设置窗口标题     this.setBackground(Color.BLACK);     this.setLocation((WINDOW_WIDTH-WIDTH)/2,(WINDOW_HEIGHT-HEIGHT)/2);//设置窗口位置     this.setSize(WIDTH, HEIGHT);//设置窗口大小     this.setLayout(getLayout());//设置窗口布局     this.setVisible(true);//设置窗口可见     this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);//设置窗口默认关闭方式   }   public void paint(Graphics g){     double x,y,r;//横纵坐标以及半径     Image image = this.createImage(WIDTH, HEIGHT);     Graphics pic = image.getGraphics();     for (int i = -2; i < 90; i++) {       for (int j = -2; j < 90; 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/3;         pic.setColor(Color.MAGENTA);         pic.fillOval((int)x, (int)y, 2, 2);       }       g.drawImage(image,0,0,this);//生成图片     }   }    public static void main(String[] args) {     new Cardioid();   } }