📚 Java Library Management System

A robust backend application built with Java that simulates a real-world library environment. This project demonstrates core Object-Oriented Programming (OOP) principles and data persistence.

🚀 Features

• Data Persistence: Saves and loads both Books and Users using File I/O (BufferedReader and FileWriter).
• Interactive CLI: A user-friendly command-line menu for managing library operations.
• Robustness: Implements Exception Handling to prevent crashes from invalid user input.
• Logic Engine: Automated systems for borrowing and returning books, checking availability, and managing user lists.

🛠️ Technologies Used

• Language: Java
• Data Structures: HashMaps, ArrayLists
• Concepts: Encapsulation, Persistence, Error Handling, File Handling

📁 Project Structure

• models: Contains Books and User classes.
• services: Contains the LibraryServices logic engine.
• data: Handles the FileHandler for saving/loading .txt files.
• app: The entry point (Main) with the CLI menu.

⚙️ How to Run

1. Clone the repository.
2. Compile the files: javac app/Main.java.
3. Run the application: java app.Main.