Here is a usefu website http://developer.java.sun.com/developer/restricted/patterns/J2EEPatternsAtAGlance.html
which has all J2EE patterns description.
My suggestion is reading some common Design Patterns first, and then come to J2EE patterns which is a must to test in Java certificate test.
which has all J2EE patterns description.
My suggestion is reading some common Design Patterns first, and then come to J2EE patterns which is a must to test in Java certificate test.