📚 Book Management System

A console-based Java application that allows users to manage books, store them permanently using JSON (GSON library), and retrieve them when the application restarts.

This project demonstrates object-oriented programming, file handling, JSON serialization/deserialization, and clean code structure using a manager class.

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🚀 Features

• Add new books
• List all books
• Search books by ISBN
• Search books by author
• Remove books
• View total number of books
• Automatically save all data to a JSON file
• Automatically load data when the program starts

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🛠 Technologies Used

• Java
• OOP (Object-Oriented Programming)
• ArrayList
• File Handling (FileWriter & FileReader)
• JSON
• GSON (Google JSON Library)

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📂 Project Structure

src/ ├── Book.java ├── BookManager.java └── Main.java books.json

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▶️ How to Run

1. Open project in IntelliJ
2. Build the project
3. Run Main.java
4. Interact with the menu in the console

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💾 JSON Persistence

The application automatically:

• Loads all books from books.json when the program starts
• Saves all changes to books.json when exiting

This makes all data persistent between sessions.

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🔧 How to Add GSON

In IntelliJ: File → Project Structure → Libraries → + → From Maven

Search: com.google.code.gson:gson:2.10.1

Add it to the project.

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🧠 What I Learned

• Designing OOP classes (Book + BookManager)
• Encapsulation and clean object structure
• Working with ArrayList
• JSON serialization/deserialization
• Using external libraries (GSON)
• Handling files with try/catch
• Implementing a menu-driven console application

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🌱 Future Improvements

• Add “find by genre”
• Add sorting options (A-Z, year, etc.)
• Add update/edit book feature
• Switch to SQLite database
• Create a GUI version of the app

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⭐ Author

pelin
📧 akkuspelin029@gmail.com
🖥 Computer Engineering Student