Yes, Window, frame and Dialog are top-level container and cannot be added to other component.
Guoqiao
Originally posted by Muhammad Farooq:
Does it mean that Window, frame and Dialog can not be added to a container?
--Farooq
Guoqiao Sun<br />SCJP2 SCWCD2<br />Creator of <a href="http://www.jiris.com/" target="_blank" rel="nofollow">www.jiris.com</a>, Java resource, mock exam, forum