I create a JMenuBar and then start adding JMenus. If one of the JMenus
is empty -- that is, no
JMenuItems have been created/added to it yet -- then at run time all
kinds of null pointer
exceptions occur and the menu bar does not display. IMO, it would be
desirableto display the
title of the empty JMenu with no popup below it.

This is Swing-0.3 with the Sun VM (jdk1.1.3) on Win95. I don't know
whether you would
consider this a bug or a "feature".