💳 Bank App

A simple yet powerful Java console application for managing bank accounts with MySQL database integration. Secure, user-friendly, and perfect for learning or small-scale banking simulations!

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🚀 Features

• Register new accounts with password hashing (BCrypt)
• Login securely
• View all accounts
• Transfer money between accounts
• Delete accounts
• Change account names
• All sensitive operations require password authentication

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🏗️ Project Structure

Bank app/
├── src/
│   ├── Main.java         # Entry point, menu logic
│   ├── Database.java     # Database operations (MySQL)
│   ├── Account.java      # Account model
│   ├── Accounts.java     # Accounts collection
│   ├── Utils.java        # Utility functions (password hashing)
│   └── org/mindrot/jbcrypt/BCrypt.java # BCrypt implementation
├── lib/
│   └── mysql-connector-j-9.3.0.jar # MySQL JDBC driver

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⚙️ Requirements

• Java 11 or newer
• MySQL server (local or remote)
• MySQL JDBC driver (included in lib/)

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🛠️ Setup & Usage

1. Clone the repository
2. Set up MySQL database:
   • You can quickly set up the database by importing the provided accounts.sql file using phpMyAdmin or the MySQL command line:

     mysql -u root -p < accounts.sql

   • This will create a database named java_bank_app and a table accounts with columns:
     • Id (INT, PRIMARY KEY, AUTO_INCREMENT)
     • AccountNumber (VARCHAR, UNIQUE)
     • Name (VARCHAR)
     • Money (INT)
     • Currency (VARCHAR)
     • Password (VARCHAR)
3. Configure database credentials
   • By default, the app connects to root user with no password. Adjust in Database.java if needed.
4. Build and run the app:
   • Compile all .java files and include the MySQL connector JAR in your classpath.
   • Example (from project root):

     javac -cp lib/mysql-connector-j-9.3.0.jar src/*.java src/org/mindrot/jbcrypt/BCrypt.java
     java -cp lib/mysql-connector-j-9.3.0.jar;src Main

5. Follow the interactive menu to manage accounts!

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🔒 Security

• Passwords are hashed using BCrypt before storing in the database.
• All sensitive actions (login, transfer, delete, update) require password verification.

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🤝 Contributing

Pull requests and suggestions are welcome! For major changes, please open an issue first to discuss what you would like to change.

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📄 License

This project uses the open-source BCrypt library by Damien Miller. See source files for license details.

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Screenshots

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🙋 FAQ

Q: Can I use a different database? A: Yes, but you will need to adjust the connection string and SQL queries in Database.java.

Q: How are passwords stored? A: Passwords are never stored in plain text. They are hashed using BCrypt.

Q: How do I reset a forgotten password? A: Currently, password reset is not implemented for security reasons.