I want to learn how to add 'event notification' between classes and am wondering how best to proceed.  Since this is just a learning exercise I'm working with my layer ordering demo.  In that example I want my bfLayerManager class to know when a new layer is added or removed to/from bfLayers.

The reason I'm posting the question under 'syntax' is I gather there's some kind of event handling system built into Java (I could be totally wrong here!) and I wondered if that was the simplest approach.

Otherwise, since the bfLayerManager class has a reference to bfLayers I can think of various crude approaches I could take - e.g. creating dedicated methods to pass 'events' between the two classes.  However that seems rather inelegant - I'd much rather be able to have a generic solution that any class can use to listen for events in the bfLayers class.

I'll go away and try and read up on this; but in the meantime if anyone has any suggestions on where to start they'll be gratefully received