Design Pattern in Java

Overview

Design Pattern1

Design Pattern2

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

By using the design patterns you can make your code more flexible, reusable and maintainable. It is the most important part because java internally
follows design patterns.

To become a professional software developer, you must know at least some popular solutions (i.e. design patterns) to the coding problems.

Pros

• 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.

Types of Design Patterns

• Creational Design Pattern
  • Factory Pattern
  • Abstract Factory Pattern
  • Singleton Pattern
  • Prototype Pattern
  • Builder Pattern
• Structural Design Pattern
  • Adapter Pattern
  • Bridge Pattern
  • Composite Pattern
  • Decorator Pattern
  • Facade Pattern
  • Flyweight Pattern
  • Proxy Pattern
• 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