private static void testMouseInfoPeer() {
    Toolkit toolkit = Toolkit.getDefaultToolkit();
    if (toolkit instanceof ComponentFactory) {
        ComponentFactory componentFactory = (ComponentFactory) toolkit;

        MouseInfoPeer mouseInfoPeer = componentFactory.getMouseInfoPeer();
        mouseInfoPeer.fillPointWithCoords(new Point());

        Window win = new Window(null);
        win.setSize(300, 300);
        win.setVisible(true);

        mouseInfoPeer.isWindowUnderMouse(win);
        win.dispose();
    }
}