Java Understanding

Java Design pattern....

1) Singleton Pattern. 

2) Factory - The instance of varies similar object will be available in single point. Hence maintenance  is easy. simply same kind of object can be removed

3) Model View Controller   -  Link : http://en.wikipedia.org/wiki/File:MVC-Process.svg 

4) Model View Presenter - 

5) FODA - Feature Oriented Design - To build the Mandatory , Optional and Dependent feature for the image

6) Facada - Act as Abstract for a module
7) Observable Patter

ASOP - Aspect oriented Programming in Spring.
OSGI - Concept to upgrading a class object without stopping the server ... in on the line

- Static Proxy - apache has
- Dynamic Proxy
- Generics -

JCP - Java Community Programming  - Forum to decalre interfaces eg servlet, JAIN sip, etc ...