Moving Two Windows Together

Question

Hello,
A friend asked me this, and I couldn't come up with a reasonable answer on the spot.
Is there a way to keep two windows (JFrames, JWindows, whatever) in the same location relative to one another? As in, if I move Window A, Window B comes along for the ride. I think his end goal is to have a window that contains settings and whatnot slide out from underneath the other window, but stay behind it most of the time. Just a little bit of the "drawer window" would be visible hanging out from behind the main window.
My first thought was, maybe there's a Listener for window movement events, but I couldn't find one. Then I thought maybe overriding the windows' setLocation() methods to first call the OTHER window's setLocation().. but that would only work after the user was done dragging, not during.
Anybody have any ideas?

Answer 1

This works for me. Updates as moving. Is that what you're looking for?
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Testing implements ComponentListener {
    public void stub1(){
        JFrame frame = new JFrame("Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.addComponentListener(this);
        frame.setPreferredSize(new Dimension(800,400));
        frame.pack();
        frame.setVisible(true);
    public void componentMoved(ComponentEvent e) {
        System.out.println("Frame moved: "+e);
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new Testing().stub1();
    public void componentHidden(ComponentEvent e) {}
    public void componentResized(ComponentEvent e) {}
    public void componentShown(ComponentEvent e) {}
}