Low-Level Design (LLD) in Java

Welcome to the Low-Level Design (LLD) repository! This repository is a comprehensive collection of Java-based projects that demonstrate key LLD principles and design patterns through practical examples. Each concept is accompanied by a flow diagram to help visualize the design process and structure.

Table of Contents

• Introduction
• Concepts Covered
• Design Patterns Implemented
• Project Structure
• Getting Started
• Contributing
• License

Introduction

This repository aims to provide a hands-on approach to understanding and applying Low-Level Design principles in software development. By working through these examples, you'll gain a deeper understanding of how to design scalable, maintainable, and efficient software systems.

Concepts Covered

The repository covers a wide range of LLD concepts, including but not limited to:

• SOLID Principles: A set of five design principles intended to make software designs more understandable, flexible, and maintainable.
• Design Patterns: Reusable solutions to common problems in software design. These patterns help improve code readability and flexibility.

Design Patterns Implemented

1. SOLID Principles

• Single Responsibility Principle
• Open/Closed Principle
• Liskov Substitution Principle
• Interface Segregation Principle
• Dependency Inversion Principle

2. Abstract Factory Design Pattern

• Example: Creating related objects, such as different types of cars, without specifying their concrete classes.

3. Decorator Design Pattern

• Example: A base pizza class with dynamic addition of toppings, allowing for flexible and extendable code.

4. Factory Design Pattern

• Example: Luxury Car and Average Car factory, demonstrating how to create objects without exposing the instantiation logic to the client.

5. Observer Design Pattern

• Example: Weather notification system where observers (users) are notified of updates, ensuring decoupled communication between objects.

6. Strategy Design Pattern

• Example: Tic-Tac-Toe game strategy, showcasing how to define a family of algorithms, encapsulate each one, and make them interchangeable.

Project Structure

The repository is organized into folders, each representing a specific LLD concept or design pattern:

LLD-java/
│
├── AbstractFactoryPattern/
│
├── DecoratorDesignPattern/
│
├── FactoryPatternDesign/
│
├── ObserverDesignPattern/
│
├── SOLID/
│
├── StrategyDesignPattern/
│
└── TicTacToe/