Design Patterns in Java

Hi friends...
Hope you guys had wonderful and environmental Diwali. From today onwards we will be discussing different design patterns in Java..
Normally design patterns are classified in following types :

S.N.	Pattern & Description
1	Creational Patterns These design patterns provide a way to create objects while hiding the creation logic, rather than instantiating objects directly using new opreator. This gives program more flexibility in deciding which objects need to be created for a given use case.
2	Structural Patterns These design patterns concern class and object composition. Concept of inheritance is used to compose interfaces and define ways to compose objects to obtain new functionalities.
3	Behavioral Patterns These design patterns are specifically concerned with communication between objects.
4	J2EE Patterns These design patterns are specifically concerned with the presentation tier. These patterns are identified by Sun Java Center.

We will star the discussion with different design patterns from in my coming blog