Design Pattern Walkthrough

The term Design Pattern is a buzzword in the software development world. Actually, we can develop software even without a design pattern, but software development is a continuous process, changes come and the software should adapt to the changes. So, if the software is developed without any consideration of the design pattern, then it is difficult to scale and maintain. Also, if design patterns are properly used, it's very easy to understand your code to other developers. A design pattern is nothing, but the adapted practices by experienced software developers, so it is a good idea to consider design patterns while we develop software.

Basically, we can divide the design pattern into the following categories:

A. Creational Design Pattern

B. Structural Design Pattern

C. Behavioural Design Pattern

D. J2EE Design Pattern (Only for Java)

A. Creational Design Pattern

1) Singleton

2) Factory

3) Abstract Factory 

4) Builder

5) Prototype 

B. Structural Design Pattern

1) Adapter 

2) Decorator

3) Bridge

4) Composite

5) Facade 

6) Flyweight 

7) Proxy

C. Behavioural Design Pattern

1) Command

2) Observer

3) Iterator

4) Memento

5) Template

6) State

7) Strategy

8) Visitor

9) Mediator 

10) Chain of Responsibility

D. J2EE Design Pattern