Java

Hi all,
I have a Custom Window which is derived from JWindow , and from that window i am displaying another window(second window) which is also derived from JWindow in an action Event..How to make the second Window behave like a modal dialog
(all the inputs to the parent window must be stopped i.e the parent window must not execute further , only after getting the response from the second window the first window must proceed…) i am in a situation that i must not use a Dialog derived from JDialog…