Simple Library Management System

A Java Swing desktop application demonstrating core software development concepts.

Features

• Add books to the library catalog
• Issue books to members
• Return books and update status
• Input validation and error handling

Concepts Demonstrated

• Event Handling - Button clicks trigger library operations
• Exception Handling - Invalid input and business rules caught gracefully
• Code Refactoring - Modular 3-layer design (Model, Service, UI)
• Unit Testing - 8 JUnit 5 test cases covering all business logic
• Git & GitHub - Full version history with meaningful commits

Setup Instructions

1. Install JDK 21 and Eclipse IDE for Java Developers
2. Clone this repository
3. Import as existing Java project in Eclipse
4. Add JUnit 5 to Build Path
5. Run LibraryAppUI.java as Java Application