Bank_Account_Management_System.java

import java.util.Scanner;

// Bank Account class to model account operations
class BankAccount {
    private String accountHolderName;
    private String accountNumber;
    private double balance;

    // Constructor to initialize the account
    public BankAccount(String accountHolderName, String accountNumber) {
        this.accountHolderName = accountHolderName;
        this.accountNumber = accountNumber;
        this.balance = 0.0;
    }

    // Method to deposit money
    public void deposit(double amount) {
        if (amount > 0) {
            balance += amount;
            System.out.println("Successfully deposited $" + amount);
        } else {
            System.out.println("Deposit amount must be positive.");
        }
    }

    // Method to withdraw money
    public void withdraw(double amount) {
        if (amount > 0 && amount <= balance) {
            balance -= amount;
            System.out.println("Successfully withdrew $" + amount);
        } else if (amount > balance) {
            System.out.println("Insufficient balance.");
        } else {
            System.out.println("Withdrawal amount must be positive.");
        }
    }

    // Method to check balance
    public void checkBalance() {
        System.out.println("Current balance: $" + balance);
    }

    // Method to display account details
    public void displayAccountDetails() {
        System.out.println("Account Holder: " + accountHolderName);
        System.out.println("Account Number: " + accountNumber);
        System.out.println("Balance: $" + balance);
    }
}

// Main class to run the banking operations
public class BankApp {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Create a new bank account
        System.out.print("Enter account holder's name: ");
        String accountHolderName = scanner.nextLine();
        System.out.print("Enter account number: ");
        String accountNumber = scanner.nextLine();

        BankAccount account = new BankAccount(accountHolderName, accountNumber);

        int choice;
        do {
            System.out.println("\nBank Account Menu:");
            System.out.println("1. Deposit Money");
            System.out.println("2. Withdraw Money");
            System.out.println("3. Check Balance");
            System.out.println("4. Display Account Details");
            System.out.println("5. Exit");
            System.out.print("Choose an option (1-5): ");
            choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.print("Enter amount to deposit: ");
                    double depositAmount = scanner.nextDouble();
                    account.deposit(depositAmount);
                    break;
                case 2:
                    System.out.print("Enter amount to withdraw: ");
                    double withdrawAmount = scanner.nextDouble();
                    account.withdraw(withdrawAmount);
                    break;
                case 3:
                    account.checkBalance();
                    break;
                case 4:
                    account.displayAccountDetails();
                    break;
                case 5:
                    System.out.println("Thank you for using the bank!");
                    break;
                default:
                    System.out.println("Invalid option. Please choose again.");
            }
        } while (choice != 5);

        scanner.close();
    }
}