Here is pretty nice example http://www.leepoint.net/GUI/structure/40mvc.html I tried to find simplest possible to let you feel the idea.
Anyway I don't like the:
Seems to me there is not a defined MVC architecture in Java.
You can use MVC, MVP and whole other patterns in various different languages. Java has nothing to do with MVC, except MVC design can be coded in Java. There are, however, some frameworks that have embedded MVC architecture and forces using it. Spring MVC is the most known - try to find more about it, maybe some tutorials.
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