Java_Swing实现小球沿正弦曲线运动的代码

 1 package zuidaimapack_1;
import java.awt.*;
import javax.swing.*;
/**
 *Java_Swing实现小球沿正弦曲线运动的代码
 * @author Visec·Dana
 */
public class SinRun extends JFrame implements Runnable {
    private static final long serialVersionUID = 1L;
    static int i = 0;
    static int j = 250;
    static double x = 0;
    static double v = 5;// 速度
    static double w = 2 * Math.PI;
    static double A = 50;// 振幅
    static double t = 0;// 时间
 
    public SinRun() {
        this.setSize(500, 500);
        this.setVisible(true);
    }
 
    public void paint(Graphics g) {
        super.paint(g);
        g.setColor(Color.black);
        g.fillOval(i, j + (int) x, 10, 10);
    }
    public void run() {
        while (true) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                // e.printStackTrace();
            }
            i += v;
            x = A * Math.sin(w * t); 
            t += 0.1;
            this.repaint();
            if (i > 500)
                i = 0;
        }
    }
    public static void main(String args[]) {
        new Thread(new SinRun()).start();
    }
}