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標籤：swing   java   正弦   曲線運動   

代碼：http://www.zuidaima.com/share/1852345677564928.htm

原文：java swing實現小球沿正弦曲線運動的代碼

package com.zuidaima.swing;import java.awt.*;import javax.swing.*;public class SinRun extends JFrame implements Runnable {static int i = 0;static int j = 250;static double x = 0;static double v = 10;// 速度static double w = 2 * Math.PI;static double A = 50;// 振幅static double t = 0;// 時間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.cos(w * t);t += 0.1;this.repaint();if (i > 500)i = 0;}}public static void main(String args[]) {new Thread(new SinRun()).start();}}