无意中发现的好玩代码:摇动的Java对话框

　　import java.awt.Point;

　　import java.awt.event.ActionEvent;

　　import java.awt.event.ActionListener;

　　import javax.swing.JDialog;

　　import javax.swing.JOptionPane;

　　import javax.swing.Timer;

　　public class Main {

　　JDialog dialog;

　　Point naturalLocation;

　　Timer shakeTimer;

　　public Main(JDialog d) {

　　dialog = d;

　　}

　　public void startShake() {

　　final long startTime;

　　naturalLocation = dialog.getLocation();

　　startTime = System.currentTimeMillis();

　　shakeTimer = new Timer(5, new ActionListener() {

　　public void actionPerformed(ActionEvent e) {

　　double TWO_PI = Math.PI * 2.0;

　　double SHAKE_CYCLE = 50;

　　long elapsed = System.currentTimeMillis() - startTime;

　　double waveOffset = (elapsed % SHAKE_CYCLE) / SHAKE_CYCLE;

　　double angle = waveOffset * TWO_PI;