Design-Pattern-in-Java

A design patterns are well-proved solution for solving the specific problem/task.

Now, a question will be arising in your mind what kind of specific problem? Let me explain by taking an example.

Advantage of design pattern:

They are reusable in multiple projects. They provide the solutions that help to define the system architecture. They capture the software engineering experiences. They provide transparency to the design of an application. They are well-proved and testified solutions since they have been built upon the knowledge and experience of expert software developers. Design patterns don?t guarantee an absolute solution to a problem. They provide clarity to the system architecture and the possibility of building a better system.

When should we use the design patterns?

We must use the design patterns during the analysis and requirement phase of SDLC(Software Development Life Cycle).

Design patterns ease the analysis and requirement phase of SDLC by providing information based on prior hands-on experiences.

Core Java Design Patterns

In core java, there are mainly three types of design patterns, which are further divided into their sub-parts:

1.Creational Design Pattern

Factory Pattern

Abstract Factory Pattern

Singleton Pattern

Prototype Pattern

Builder Pattern.

2. Structural Design Pattern

Adapter Pattern

Bridge Pattern

Composite Pattern

Decorator Pattern

Facade Pattern

Flyweight Pattern

Proxy Pattern

3. Behavioral Design Pattern

Chain Of Responsibility Pattern

Command Pattern

Interpreter Pattern

Iterator Pattern

Mediator Pattern

Memento Pattern

Observer Pattern

State Pattern

Strategy Pattern

Template Pattern

Visitor Pattern