How to refresh the panel's display in listener?

I have a Jcombobox and a panel(square,background color:white). I want user to choose the panel's size from the combobox and thus change the panel's display. However, when I choose a value from combobox, the panel's size DOES change, but the display cannot be rerfreshed realtimely. It still display the panel by previous size. If I minimize the whole window and restore, then the panel gets refreshed, displaying by new size.
Can anybody tell me how to refresh the panel's display dynamically? thank you a lot.
sraiper

if we bounce the listener the connections to other might be lost.NO!
The listener contacts the DB to establish the initial connection between client & DB.
After the connection between DB & client has started, the listener has NO involvement between DB & client.
Stopping the listener has NO impact on existing sessions.
Edited by: sb92075 on Jul 28, 2009 4:37 PM

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Attachments:
remotePanelBehavior1.jpg ‏216 KB

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