Design Patterns using Java

Patterns
Creational Patterns
Abstract Factory
Builder
Factory Method
Prototype
Singleton

Structural Patterns
Adapter
Bridge
Composite
Decorator
Facade
Flyweight
Proxy
Behavioral Patterns (To Be Implemented)
Chain of Responsibility
Command
Interpreter
Iterator
Mediator
Momento
Observer
State
Strategy
Template Method
Visitor

URL :
http://www.cs.unc.edu/~vivek/patterns/doc/