I have to confess there is no Java gurus here. My understanding is that Java gurus won't come here.
I guess you are talking about the applications of patterns in Java. right? It is an issue of time to learn these things. One needs to read more, think more, and learn from the veterans in the team. Your question is so huge. I am afraid that few poeple can "tell" you how to use patterns.
By the way, methodologies are different from,
but related to patterns. If you are really talking about using methodologies in Java project, I suggest you download a Rational Rose 2000. You will soon know how to generate Java code on the basis of your class diagrams.
Sorry for disappointing you.
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