Patterns are so usefull in J2EE that they have a book on it.
Core J2EE Patterns: Best Practices and Design Strategies
by Deepak Alur, John Crupi, Dan Malks
Since UML usually use with Partterns i think you need to know it
dont know anything on Refactoring but! will soon i hope.
[This message has been edited by FEI NG (edited November 14, 2001).]
[This message has been edited by FEI NG (edited November 14, 2001).]