Adding custom elements to a JPopupMenu

The problem can be stated in two different ways:

1. I have a JPopupMenu where I want to insert a component which is not a JMenuItem (a custom JTree)... but I dont know how to do it

or

2. I have a different Popup (JPopupPanel) and I want 开发者_C百科to add JMenuItems below my custom JTree and that those JMenuItems work as if they were inserted in a JPopupMenu: they are highlighted when mouse is over and popup is closed when one of them is selected.

Any hints?

NOTE: in 2. I can add the JMenuItems without problem, show they are shown in the Popup, but they dont act as when they are in a JMenu or JPopupMenu

For 1. JPopupMenu supports insertion of any Component with the method

public void insert(Component component, int index)

For 2. Did you add an ActionListener to the menu?