Examples of bigger apps?

hi, I'm having a frustrating time... can anybody help?
I know VC++ fairly well in an amateurish way and I really don't understand how Java apps of any size work... do they use the application-document-view architecture which seems to underpin most VC++ projects? It is proving very difficult to find non-trivial Java apps unless they are way over my head... Where can I get hold of a basic Java application skeleton?
Also, no books online or otherwise seem to explain how you go about splitting things up into discrete classes and yet letting them communicate adequately with one another... or what is the "ancestor" or indeed "parent" of a component... is it a JFrame?... where is all this documented? Where are examples of larger apps? Of the process by which they are developed?
Also, because so much code is taken up with just getting on top of the GUI and the layout managers, programs of any significance seem to grow at a frightening rate meaning that you soon do in fact have to split things up...
And then you find a passing comment in a doc saying "keep your GUI code separate from the business logic"... OK, care to spend a bit of time on that?
Please somebody recommend an online resource...??
Mike

this is a crosspost of http://forum.java.sun.com/thread.jsp?forum=54&thread=157095

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