[CentOS] [OT] how to specify dimensions a a Java Popup

How, if at all, does one specify the size of a Java Popup?
setSize on the contents Component does not get the job done
regardless of when applied.
I keep getting the same small square, serveral pixels on an edge.
Is this documented somewhere?
I've been trying to use docs.oracle.com, but nothing I've
found answers the question.
I truly hate the poke it and see what it does method of finding
out what something is supposed to do.  It never works.

-- 
Michael   hennebry at web.cs.ndsu.NoDak.edu
"On Monday, I'm gonna have to tell my kindergarten class,
whom I teach not to run with scissors,
that my fiance ran me through with a broadsword."  --  Lily