OOP Design - Fundamentals and Principles - Preface

How to achieve effective design?

1. Follow OOP (object oriented programming) fundamentals
2. Avoid bad design characteristics (code smell)
3. Embrace Design Principles
• Class Design - SOLID & GRASP
• Package Design
4. Consider Design Patterns and Anti-patterns

In next series of articles,

I would explain below topics along with example java code.

• OOP Fundamentals [Part-1]
• Class design principles - SOLID [Part-2] & GRASP [Part-3 - coming soon]
• Package design principles [Part-4 - coming soon]

Note: This series is focused to cover OOP fundamentals and design principles. Design patterns and anti-patterns are not included as part of this series; instead I shall cover those separately

A bird's-eye view of OOP fundamentals and design principles

Design Principles vs. Design Patterns?

• Design Principle – A set of guidelines that helps us to avoid having a bad design.
• Design Pattern
• Emphasize on principles to assign responsibilities.
• General reusable solution for a problem.
• Shows relationships and interactions between classes or object.
• Example
• Principle – Dependency Inversion Principle
• Pattern – Factory, Abstract Factory (Object Creational)
• Popular frameworks – Spring IoC, Guice, JavaEE CDI, etc.