Question

I’d like to make an auto-hide the JToolBar and it appear only when the mouse goes near/over the JToolBar. I have added the JToolBar in JPanel. There is no mouseover listener in JToolBar. How to do this?

Answer 1

Add a MouseMotionListener to your JFrame or JDialog.

addMouseMotionListener(new MouseAdapter() {
    public void mouseMoved(MouseEvent e) {
         toolbar.setVisible(e.getY() < 10);
     }
});

In that way, the tool bar will only be shown if the mouse is in the top 10 vertical pixels of the window.