Java Design Patterns

Introduction

Design Patterns are general architectural solutions. Following Design Patterns could speed up the development of robust applications.

SOLID Design Principles

Single Responsibility Principle (SSR)

A Class will do one thing only.

Open-Closed Principle (OCP)

Class should be open to extension, but closed for modification.

Liskov Substitution Principle (LSP)

Any places use the parent class could be replaced by subtype class without errors.

Interface Segregation Principle (ISP)

Segregate interfaces to small interfaces rather than using one big interface.

Dependency Inversion Principle (DIP)

A. High-level module should not depend on Low-level modules, both should depend on abstractions
B. Abstractions should not depend on details, details should depend on abstractions

High Level Classes –> Abstraction Layer –> Low Level Classes