Java Design Pattern

Shailendra kumar shail @ AVACorp.biz

Design Pattern in Java

Abstract: “Pattern” as the name suggests, means series of events occurring in a definite order. The patterns can be found in Java and J2ee technologies also. Many a times, we find that there is a particular way of tackling a problem. This way is easy and has been used many times successfully by a number of people earlier also. This method becomes a pattern.
Learning the design patterns is a multiple step process:

·         Acceptance

·         Recognition

·         Internalization

 “Design patterns are recurring solutions to design problems.”

Patterns: According to commonly known practices, there are 23 design patterns in Java. These patterns are grouped under 3 heads:
1. Creational Patterns

·         Factory

·         Abstract Factory

·         Singleton

·         Builder

·         Prototype

2. Structural Patterns

·         Adapter

·         Bridge

·         Composite

·         Decorator

·         Façade

·         Flyweight

·         Proxy

3. Behavioral Patterns

·         Chain of Responsibility

·         Command

·         Interpreter

·         Iterator

·         Mediator

·         Momento

·         Observer

·         State

·         Strategy

·         Template

·         Visitor