Java_Swing实现小球沿正弦曲线运动的代码

 1 package zuidaimapack_1;

 2 import java.awt.*;

 3 import javax.swing.*;

 4 /**

 5  *Java_Swing实现小球沿正弦曲线运动的代码

 6  * @author Visec·Dana

 7  */

 8 public class SinRun extends JFrame implements Runnable {

 9     private static final long serialVersionUID = 1L;

10     static int i = 0;

11     static int j = 250;

12     static double x = 0;

13     static double v = 5;// 速度

14     static double w = 2 * Math.PI;

15     static double A = 50;// 振幅

16     static double t = 0;// 时间

17  

18     public SinRun() {

19         this.setSize(500, 500);

20         this.setVisible(true);

21     }

22  

23     public void paint(Graphics g) {

24         super.paint(g);

25         g.setColor(Color.black);

26         g.fillOval(i, j + (int) x, 10, 10);

27     }

28     public void run() {

29         while (true) {

30             try {

31                 Thread.sleep(100);

32             } catch (InterruptedException e) {

33                 // e.printStackTrace();

34             }

35             i += v;

36             x = A * Math.sin(w * t); 

37             t += 0.1;

38             this.repaint();

39             if (i > 500)

40                 i = 0;

41         }

42     }

43     public static void main(String args[]) {

44         new Thread(new SinRun()).start();

45     }

46 }