Re: How to shake a window as MSN or Yahoo Messenger does

import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.*;
import java.util.Random;

/**
 * @author Bart Cremers (bce1716)
 * @since Apr 28, 2006
 */
public class ShakeFrame extends JFrame implements Runnable {

    private static final int SHAKES = 25;
    private static final int SHAKE_FORCE = 5;
    private static final Random RND = new Random();
    private JButton button;

    @Override
    protected void frameInit() {
        super.frameInit();
        JPanel pane = new JPanel();
        pane.setBorder(BorderFactory.createEmptyBorder(50, 50, 50,
50));
        setContentPane(pane);

        button = new JButton("Shake Me !");
        add(button);

        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                button.setEnabled(false);
                new Thread(ShakeFrame.this).start();
            }
        });
    }

    public void run() {
        final Rectangle origRect = ShakeFrame.this.getBounds();
        for (int i = 0; i < SHAKES; i++) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    int x;
                    if (RND.nextBoolean()) {
                        x = SHAKE_FORCE;
                    } else {
                        x = -SHAKE_FORCE;
                    }

                    int y;
                    if (RND.nextBoolean()) {
                        y = SHAKE_FORCE;
                    } else {
                        y = -SHAKE_FORCE;
                    }

                    ShakeFrame.this.setBounds(origRect.x + x,
origRect.y + y, origRect.width,
                                              origRect.height);
                }
            });
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) { }
        }

        ShakeFrame.this.setBounds(origRect); // Reset to original
position
        button.setEnabled(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                JFrame frame = new ShakeFrame();
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        });
    }
}