Library Information Management System

A Java Swing-based Object-Oriented Programming (OOP) application designed to load, manage, search, and analyze a library's catalogue database. The system handles various library item types including Books, CDs, and DVDs, and supports processing loan statistics to compute analytics such as the top-performing loans.

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Features

• Multi-Category Catalogue Support: Load and manage different item categories:
  • Books: Catalogued with author and page count details.
  • CDs: Catalogued with artist and track details.
  • DVDs: Catalogued with director and runtime details.
• Fast Search & Lookup:
  • Instant $O(1)$ lookups by OCLC (Unique identifier) using HashMaps.
  • Category-wide searches and list filtering by Genre.
• Reports & Diagnostics:
  • Generate full catalogue summaries.
  • Generate genre-specific reports.
  • Save generated reports directly to local files (catalogue_report.txt).
• Loan Statistics Analytics:
  • Load external loan records.
  • Identify and report the Top 10 most-loaned library items.
• User-Friendly Swing Dashboard: A clean GUI featuring tabbed selection, search text-fields, action buttons, and a monospaced scrollable console log to view detailed outputs.

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Design & OOP Principles

This project serves as a showcase for core Object-Oriented Programming (OOP) concepts in Java:

1. Abstraction:
   • Uses an abstract base class LibraryItem to define common attributes and force concrete subclasses (Book, CD, DVD) to implement their category-specific metadata and toString() representation.
2. Inheritance:
   • Subclasses inherit common properties (OCLC, Title, Genre, Publication Year) from the parent LibraryItem class.
3. Encapsulation:
   • Uses protected fields, final attributes, and public getter methods to hide internal implementation and expose read-only state.
4. Polymorphism:
   • Dynamically resolves category types and toString() formatting at runtime depending on the actual subclass instance.

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Directory Structure

├── Data/                       # Sample catalog & loan record TXT files
├── src/                        # Source Java files
│   ├── Main.java               # App entry point
│   ├── DashBoard.java          # Swing GUI and Event Listeners
│   ├── LibraryItem.java        # Abstract base class
│   ├── Book.java               # Book representation
│   ├── CD.java                 # CD representation
│   ├── DVD.java                # DVD representation
│   ├── CatalogueLoader.java    # File reader & parser helper
│   ├── ReportGenerator.java    # Exporters for reports
│   └── LoanStat.java           # Model for loan records
├── .gitignore                  # Git exclusions configuration
└── README.md                   # Project documentation

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How to Compile & Run

Prerequisites

• Java Development Kit (JDK): Version 8 or higher installed on your computer.

Step 1: Compile the Code

Navigate to the root directory of the project in your terminal and compile all Java source files:

javac -d out src/*.java

Step 2: Run the App

Run the compiled Java bytecode class:

java -cp out Main

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Sample Data Format

To test the file loading capabilities, use the text files provided in the Data/ directory.

• Catalogues: Tab or comma-separated item files.
• Loans: Files containing OCLC numbers alongside loan statistics.