Bank Management System

This project is a Java-based banking application with a graphical user interface (GUI) that supports various functionalities such as account management, transactions, balance inquiries, and currency exchange. It uses a HashMap to store customer information and Swing for the GUI components.

Features

Account Management: Create deposit, saving, and currency accounts.

Transactions: Perform deposits, withdrawals, and money transfers.

Balance Inquiries: Check account balances.

Currency Exchange: Convert account balance to different currencies.

Class Descriptions

Customer.java

The Customer class represents individual customers of the bank. Each customer has unique attributes such as customerID, password, name, surname, address, and contactNumber. Additionally, a Customer object maintains a collection of accounts associated with that customer through a Map<Integer, Account>, which allows easy access to all accounts owned by a particular customer. This map is initialized by the constructor.

• transferMoney(Customer receiver, double amount): Enables a customer to transfer a specified amount of money to another customer. The transfer is only possible if the sender has sufficient funds in their account. This method is used inside TransferMoneyPage.java.

Bank.java

The Bank class manages customer data using a HashMap<String, Customer>, where each entry is keyed by the customer's unique customerID. This structure facilitates efficient retrieval and manipulation of customer information.

Account.java

The Account class is an abstract superclass that defines common methods and attributes shared by DepositAccount, CurrencyAccount, and SavingAccount. It includes methods for depositing and withdrawing funds and accessing and modifying attributes like balance and currencyUnit.

• deposit(double amount): Adds the specified amount to the account's balance.

• withdraw(double amount): Subtracts the specified amount from the account's balance.

These methods are called inside DepositWithdrawPage.java.

CurrencyAccount.java

The CurrencyAccount class extends Account. Its constructor calls the superclass constructor and sets the accountType to 3. A HashMap<String, Double> for exchange rates is initialized.

• exchangeCurrency(String fromCurrency, String toCurrency, double amount): Exchanges currency units based on the provided exchange rates. This method is used in ExchangeCurrencyPage.java.

GUI Components

The application uses various Swing components to create its GUI:

• SignUpPage.java: Contains Swing elements for creating a user account and validates user input.
• LoginPage.java: Initializes the bank HashMap and handles the login process, checking if the entered customerID and password exist in the bank.
• CreateAccountPage.java: Allows users to create different types of accounts (deposit, saving, currency) using radio buttons and buttons.
• DepositWithdrawPage.java: Facilitates deposit and withdrawal operations by prompting the user to select an account and enter an amount.
• TransferMoneyPage.java: Allows users to transfer money to another account by entering the recipient's ID.
• ExchangeCurrencyPage.java: Handles currency exchange operations, converting the account balance to a specified unit.
• ShowBalancePage.java: Displays the user's account information.
• UpdateInfoPage.java: Provides input fields and buttons for updating user information such as name, surname, address, and contact number.
• MainPage.java: The main interface of the application with buttons for all major operations and a logout button that returns to the login page.

Libraries and Elements Used

• javax.swing
• java.awt
• java.awt.event.ActionEvent
• java.awt.event.ActionListener
• java.awt.Color
• java.awt.Font
• javax.swing.JButton
• javax.swing.JFrame
• javax.swing.JLabel
• javax.swing.JOptionPane
• javax.swing.JPasswordField
• javax.swing.JTextField

How to Run

1. Clone the repository.

2. Open the project in your preferred Java IDE.

3. -Run the Test.java to start the application.