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Java Contact Management Application

Standalone Java console application for managing personal and business contacts — developed as my final thesis (Bachelor's degree project).

The application provides full CRUD functionality and follows a clean multi-layered architecture, ensuring separation of concerns, maintainability, and scalability.

Java Maven OpenCSV

Features

  • View all contacts
  • Add new contacts
  • Update existing contacts
  • Delete contacts
  • Manage multiple contact details (phone numbers, emails, links)
  • Search contacts by name and/or surname
  • Input validation and proper exception handling

Architecture

The project is built using a four-layered architecture:

  • Presentation Layer — Console-based user interface (menu and user input)
  • Service Layer — Business logic and data validation
  • DAO Layer — Data access and persistence (CSV file operations)
  • Model Layer — Domain classes (Kontakt, KontaktDetalji, Email, Telefon, Link)

This design follows Object-Oriented Programming principles and the Separation of Concerns principle.

Data Persistence

Data is stored in CSV files using the OpenCSV library:

  • kontakt.csv — Stores basic contact information
  • kontakt_detalji.csv — Stores additional details (one-to-many relationship)

Technologies & Tools

  • Java 21 (LTS)
  • Maven — Dependency and build management
  • OpenCSV — CSV parsing and generation
  • IntelliJ IDEA Community Edition

How to Run

  1. Clone the repository: 
    git clone https://github.com/milos-7a/Java-Contacts-Manager.git
cd JavaContactsMngr
  2. Run the application using Maven: 
    mvn clean compile
mvn exec:java -Dexec.mainClass="com.milos.contactsmanager.main"

Or simply run the Main class directly from IntelliJ IDEA.

Author

Miloš Nikolić, Bachelor of Science in Information Technology, Final Thesis Project

License

This project is licensed under the MIT License.