JPanel/JFrame refresh

I am writing an application which removes a JPanel and replaces it when you perform certain actions, this usually works but when I add a new row (3 buttons, 3 textfield) to the JPanel you need to minimize and maximize the window to get it to refresh properly.

Does anyone know what methods I need to call in order to force this refresh without the user having to minimize the window? It would be the same method(s) implicitly called when a jframe is minimized/maximised. Thanks.

[491 byte] By [jjdevinea] at [2007-11-27 10:49:41]