🚀 go-pugleaf

Somebody who works with me has created a class that extends JPanel.
This class is a calendar gui.

Now I want to add this calendar to a JMenu or something that looks like
it.

What I want to do is when the user clicks on a label, the calendar shows
up at the bottom of that label.  When the date is selected then the
calendar disappears.  Somebody told me that the best way to do that was
to add it to a JMenu.  Can anybody point me to the right direction?

Thanks in advance.

Alex.