🏦 Bank Management System (Java Console Application)

A simple Bank Management System built using Core Java. This project simulates basic banking operations like account creation, transactions, and transaction history using file handling.

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🚀 Features

• 🆕 Create Bank Account
• 🔐 Secure Login (Password Protected)
• 💰 Deposit Money
• 💸 Withdraw Money
• 🔁 Transfer Money between accounts
• 📄 View Account Details
• 📊 Check Balance
• 🔑 Change Password
• 🧾 Transaction History (Saved in file)

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🛠️ Tech Used

• Java (Core Java)
• OOP Concepts
• File Handling (BufferedReader / BufferedWriter)
• Exception Handling
• ArrayList (Collection Framework)

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📁 Project Structure

BankAccount.java                  // Account logic & operations
Main.java                         // User interface & flow
InsufficientBalanceException.java // Custom exception
accounts.txt                      // Stores account data
transactions.txt                  // Stores transaction history

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⚙️ How It Works

• All accounts are stored in a file (accounts.txt)
• On program start → data loads into memory (ArrayList)
• On every operation → file gets updated
• Transaction history is maintained separately

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▶️ How to Run

1. Clone the repository:

git clone https://github.com/YOUR_USERNAME/bank-management-system-java.git

2. Open in any IDE (IntelliJ recommended)

3. Run:

Main.java

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🧠 Concepts Learned

• Object-Oriented Programming (Encapsulation, Abstraction)
• File Handling vs In-Memory Data
• Custom Exception Handling
• Real-world logic building
• Debugging & Project Structuring

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📌 Future Improvements

• GUI (JavaFX / Swing)
• Database integration (MySQL / JDBC)
• Password encryption
• Multi-user support

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🙌 Author

Prakhar Singh

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⭐ If you like this project

Give it a star ⭐ on GitHub and share your feedback!