BankAccount.java

import java.util.Scanner;

class BankAccount {
    private double balance;

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

    public double getBalance() {
        return balance;
    }

    public boolean deposit(double amount) {
        if (amount > 0) {
            balance += amount;
            return true;
        } else {
            System.out.println("Invalid amount for deposit.");
            return false;
        }
    }

    public boolean withdraw(double amount) {
        if (amount > 0 && amount <= balance) {
            balance -= amount;
            return true;
        } else {
            System.out.println("Insufficient funds or invalid amount for withdrawal.");
            return false;
        }
    }
}

class ATM {
    private BankAccount bankAccount;

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

    public void displayMenu() {
        System.out.println("\nMenu:");
        System.out.println("1. Withdraw");
        System.out.println("2. Deposit");
        System.out.println("3. Check Balance");
        System.out.println("4. Exit");
    }

    public void withdraw(double amount) {
        if (bankAccount.withdraw(amount)) {
            System.out.println("Withdrawal successful. Remaining balance: " + bankAccount.getBalance());
        }
    }

    public void deposit(double amount) {
        if (bankAccount.deposit(amount)) {
            System.out.println("Deposit successful. Current balance: " + bankAccount.getBalance());
        }
    }

    public void checkBalance() {
        System.out.println("Your balance: " + bankAccount.getBalance());
    }

    public void run() {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            displayMenu();
            System.out.print("Enter your choice: ");
            String choice = scanner.nextLine();
            switch (choice) {
                case "1":
                    System.out.print("Enter amount to withdraw: ");
                    double withdrawAmount = scanner.nextDouble();
                    withdraw(withdrawAmount);
                    break;
                case "2":
                    System.out.print("Enter amount to deposit: ");
                    double depositAmount = scanner.nextDouble();
                    deposit(depositAmount);
                    break;
                case "3":
                    checkBalance();
                    break;
                case "4":
                    System.out.println("Thank you for using the ATM. Goodbye!");
                    scanner.close();
                    return;
                default:
                    System.out.println("Invalid choice. Please try again.");
                    break;
            }
        }
    }
}

public class Main {
    public static void main(String[] args) {
        BankAccount account = new BankAccount(1000); // Initial balance
        ATM atm = new ATM(account);
        atm.run();
    }
}