Expand the JTabbedPane

[Hussein Baghdadi]

Hi guys.
I have a JFrame, in the main Jpanel(layoutmanager for this panel is null), inside this panel,I but JTabbedPane.
every thind OK.
but when I maximaize the frame, the Jpanel and the tabbedpane doesn't expand(the tabbedpane take the original jframe size).
how can I force the tabbedpane to expand when I maximize the frame?

[Ernest Friedman-Hill]

Easy -- don't use a null LayoutManager! Use a BorderLayout and put the JTabbedPane in the CENTER spot.
Why use a null LayoutManager?