Java模拟八大行星运动效果

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class SolorSystem extends Frame{
    
    double x , x1 = 200,x2 = 200,x3 = 200,x4 = 200,x5 = 200,x6 = 200,x7 = 200,x8 = 200;
    double y , y1 = 200,y2 = 200,y3 = 200,y4 = 200,y5 = 200,y6 = 200,y7 = 200,y8 = 200;
    double t = 0,t1 = 0,t2 = 0,t3 = 0,t4 = 0,t5 = 0,t6 = 0,t7 = 0,t8 = 0;
    private Image offScreenImage = null;
    void loadFrame(){
        this.setSize(900,900);
        this.setLocation(50,50);
        this.setTitle("火星十一郎");
        myEvent();
        this.setVisible(true);
//        this.setBackground(Color.black);
        new PaintThread().start();
    }
    public void update(Graphics g) {
        if(offScreenImage == null)
            offScreenImage = this.createImage(900, 900);
        
        Graphics gOff = offScreenImage.getGraphics();
        Color oldColor = gOff.getColor();
        gOff.setColor(Color.GREEN);
        gOff.fillRect(0, 0, 900, 900);
        gOff.setColor(oldColor);
        paint(gOff);
        g.drawImage(offScreenImage, 0, 0, null);
    }
    
    Image sun = Toolkit.getDefaultToolkit().getImage("images/sun.jpg");
    Image bg = Toolkit.getDefaultToolkit().getImage("images/bg.jpg");
    Image mercury = Toolkit.getDefaultToolkit().getImage("images/Mercury.jpg");
    Image venus = Toolkit.getDefaultToolkit().getImage("images/Venus.jpg");
    Image earth = Toolkit.getDefaultToolkit().getImage("images/Earth.jpg");
    Image mars = Toolkit.getDefaultToolkit().getImage("images/Mars.jpg");
    Image jupiter = Toolkit.getDefaultToolkit().getImage("images/Jupiter.jpg");
    Image saturn = Toolkit.getDefaultToolkit().getImage("images/Saturn.jpg");
    Image uranus = Toolkit.getDefaultToolkit().getImage("images/Uranus.jpg");
    Image neptune = Toolkit.getDefaultToolkit().getImage("images/Neptune.jpg");
    Image moon = Toolkit.getDefaultToolkit().getImage("images/moon.jpg");
    
    public void paint(Graphics g){
        g.setColor(Color.blue);
        g.drawImage(bg , 0 , 0 , null);
        g.drawImage(sun , 435 , 435 , null);
        g.drawOval(401, 415, 88, 60);
        g.drawOval(375, 395, 140, 100);
        g.drawOval(335, 365, 220, 160);
        g.drawOval(285, 335, 320, 220);
        g.drawOval(155, 275, 580, 340);
        g.drawOval(120, 245, 650, 400);
        g.drawOval(80, 210, 730, 470);
        g.drawOval(10, 165, 870, 560);
        
        t1 = t1 + Math.PI / 8.8;         //公转周期为88天
        t2 = t2 + Math.PI / 22.5;
        t3 = t3 + Math.PI / 36.5;
        t = t + Math.PI / 0.1;
        t4 = t4 + Math.PI / 68.7;
        t5 = t5 + Math.PI / 432.9;
        t6 = t6 + Math.PI / 1076.8;
        t7 = t7 + Math.PI / 3066.0;
        t8 = t8 + Math.PI / 6015.2;
        
        g.drawImage(mercury , (int)x1 ,(int)y1, null);
        x1 = 440 + 44 * Math.cos(t1);
        y1 = 440 + 30 * Math.sin(t1);
        g.drawImage(venus , (int)x2 ,(int)y2, null);
        x2 = 440 + 70 * Math.cos(t2);
        y2 = 440 + 50 * Math.sin(t2);
        g.drawImage(earth , (int)x3 ,(int)y3, null);
        x3 = 440 + 110 * Math.cos(t3);
        y3 = 440 + 80 * Math.sin(t3);
        g.drawImage(moon , (int)x ,(int)y, null);
        x = x3 + 15 * Math.cos(t1);
        y = y3 + 15 * Math.sin(t1);
        g.drawImage(mars , (int)x4 ,(int)y4, null);
        x4 = 440 + 160 * Math.cos(t4);
        y4 = 440 + 110 * Math.sin(t4);
        g.drawImage(jupiter , (int)x5 ,(int)y5, null);
        x5 = 435 + 290 * Math.cos(t5);
        y5 = 435 + 170 * Math.sin(t5);
        g.drawImage(saturn , (int)x6 ,(int)y6, null);
        x6 = 428 + 325 * Math.cos(t6);
        y6 = 428 + 200 * Math.sin(t6);
        g.drawImage(uranus , (int)x7 ,(int)y7, null);
        x7 = 435 + 365 * Math.cos(t7);
        y7 = 435 + 235 * Math.sin(t7);
        g.drawImage(neptune , (int)x8 ,(int)y8, null);
        x8 = 435 + 435 * Math.cos(t8);
        y8 = 435 + 280 * Math.sin(t8);
    }

    public static void main(String[] args){
        SolorSystem ball = new SolorSystem();
        ball.loadFrame();
    }
    
    private class PaintThread extends Thread{
        public void run(){
            while(true){
                repaint();
                try {
                    Thread.sleep(40);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    
    private void myEvent()
    {
        this.addWindowListener(new WindowAdapter()//窗口监听
        {
            public void windowClosing(WindowEvent e)
            {
                //System.out.println("窗体执行关闭！");
                System.exit(0);
            }
        });
    }

}