ActionListeners in one panel effecting objects in another

Hi All,
I am setting up a gui which contains a JFrame, within which I am adding classes extended from JPanels. These in turn, have more classes derived from JPanels add to then, in the standard Swing way. I want to know the best way of listening for say a button press in one of the base panels, and it causing an effect in another panel?
I can think of several ways, based around lots of listeners and the messages basically been passed up and across the chain (well tree type structure), but this seems a little cumbersome. If there a way of setting the required available actions without having to do this?
Adam

You can use the Mediator Pattern where a 'mediator class handles events.
The mediator is instantiated in upon the start of the App. then it is passed to all
classes that need it. Then, those classes that the Mediator needs to have a link to should register
themselves with the mediator.
With that said, let's say Class A needs a button actioon to do something to Class B.
Have a process in Mediator called registerClassB(ClassB classB) so the Mediator has a link to it.
Then have mediator passed to Class A and Class B. Class A will set it event listeners to the mediator
(since the mediator will have the proper event listners like mouse and action listners. Class B
will invoke the mediators registerClassB and pass itself.
Whatever event you wan to happen, have it set up in the mediator.

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