Online Banking System (Java GUI + SQLite)

Project Description

This is a Java GUI-based Online Banking System developed using Java Swing and SQLite. The project follows MVC architecture and demonstrates core Java concepts, database connectivity, multithreading, and event-driven programming.

Technologies Used

• Java 11+
• Java Swing (GUI)
• SQLite
• JDBC
• VS Code

Features

• User Registration
• User Login
• Deposit Money
• Withdraw Money
• Balance Inquiry
• Transaction Logging
• Background Balance Monitoring (Multithreading)

Project Structure

• db : Database connection and initialization
• model : Entity classes (User, Transaction)
• dao : Database operations (DAO pattern)
• controller: Business logic (Servlet-like controllers)
• ui : Java Swing GUI
• thread : Multithreading implementation
• exception : Custom exceptions

How to Run

1. Ensure Java 11+ is installed
2. Place sqlite-jdbc.jar in project root
3. Add sqlite-jdbc.jar to classpath (VS Code settings.json)
4. Run Main.java

Database

• SQLite database is auto-created as bank.db
• Tables: users, transactions

OOP Concepts Used

• Inheritance (BaseFrame)
• Polymorphism (BankOperations interface)
• Interfaces
• Exception Handling

Multithreading

A background thread monitors account balance periodically using synchronization.

Conclusion

This project demonstrates clean architecture, robust error handling, and full integration of GUI, database, and business logic.