Facebook Management System

A simulation of Facebook’s core functionality using Object-Oriented Programming principles in Java.

📌 Overview

This project mimics Facebook's backend logic for managing users, posts, friendships, and private messaging — all built from scratch using core OOP concepts. It also supports persistent file storage and user interaction through the console.

🧠 Features

• User registration and login with credentials validation
• Post creation with privacy settings (Public/Friends-only)
• Commenting and replying to posts/comments
• Friend requests, mutual friends/posts detection
• Operators + and & overloaded for mutual content
• Messaging system between users
• Restricted vs. regular friend access
• Role-based friend visibility and trust scores
• File-based storage and retrieval of data
• Full exception handling

⚙️ Technologies Used

• Java
• OOP (Inheritance, Polymorphism, Encapsulation, Abstraction)
• UML Class Diagrams
• File I/O
• Exception Handling

🧩 Core Classes

• User
• FriendShip
• Post, Comment, Reply
• Message, Conversation
• FriendRequest, Notification

📂 File Structure

📁 src ├── User.java ├── FriendShip.java ├── FriendRequest.java ├── Post.java ├── Comment.java ├── Reply.java ├── Messages.java ├── Conversation.java ├── Main.java

📌 Run Instructions

1. Clone the repository
2. Open project in any Java IDE (e.g. IntelliJ or Eclipse)
3. Run Main.java
4. Follow the console instructions

🎓 Learning Outcome

This project was built to practice:

• Class design and interaction
• Real-life system simulation
• Deep use of file I/O and validation
• Robust exception handling and test-driven input