atm interface.java

import java.util.Scanner;

class BankAccount {
    private double balance;

    public BankAccount(double balance) {
        this.balance = balance;
    }

    public String deposit(double amount) {
        balance += amount;
        return "Deposited ₹" + amount + ". New balance: ₹" + balance;
    }

    public String withdraw(double amount) {
        if (amount > balance) {
            return "Insufficient funds";
        }
        balance -= amount;
        return "Withdrew ₹" + amount + ". New balance: ₹" + balance;
    }

    public String checkBalance() {
        return "Current balance: ₹" + balance;
    }
}

class ATM {
    private BankAccount bankAccount;

    public ATM(BankAccount bankAccount) {
        this.bankAccount = bankAccount;
    }

    public void userInterface() {
        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("\nATM Menu:");
            System.out.println("1. Withdraw");
            System.out.println("2. Deposit");
            System.out.println("3. Check Balance");
            System.out.println("4. Exit");

            System.out.print("Enter your choice (1-4): ");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.print("Enter the amount to withdraw: ₹");
                    double withdrawAmount = scanner.nextDouble();
                    System.out.println(bankAccount.withdraw(withdrawAmount));
                    break;

                case 2:
                    System.out.print("Enter the amount to deposit: ₹");
                    double depositAmount = scanner.nextDouble();
                    System.out.println(bankAccount.deposit(depositAmount));
                    break;

                case 3:
                    System.out.println(bankAccount.checkBalance());
                    break;

                case 4:
                    System.out.println("Thank you for using the ATM. Goodbye!");
                    scanner.close();
                    System.exit(0);
                    break;

                default:
                    System.out.println("Invalid choice. Please enter a number between 1 and 4.");
                    break;
            }
        }
    }
}

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter initial account balance: ₹");
        double initialBalance = scanner.nextDouble();

        BankAccount userAccount = new BankAccount(initialBalance);
        ATM atm = new ATM(userAccount);

        atm.userInterface();
    }
}