Design Patterns Introduction

                  Design Patterns

Introduction:

Mistakes are meant for learning not repeating and wise man learns from the experience of others.

Based on such mistakes/experiences software developers had design the solutions for general problems. It represents best practices which should be use by software developers while designing a solution.

Initially it is based on below principles of object oriented design but later it has been evolved over a long period of time

1)      Object composition over inheritance

2)      Program to an interface not an implementation

Why should we use design patterns?

1)      It will provide common standard terminology to all software developers.

2)      It helps software developers to learn design in a easy way

Design patterns are broadly classified under below categories

1)      Creational Patterns: These patterns are used to create objects while hiding the internal logic which gives a program more flexibility to decide which object needs to be materialized at given instance.

2)      Structural Patterns:  These patterns focus on class and object compositions.

3)      Behavioral Patterns : These are design to focus on communication between objects.

We will look into all these type of patterns closely  in next articles: