task3

import java.util.Scanner;
 class BankAccount {
    private double balance;

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

    public double getBalance() {
        return balance;
    }

    public void deposit(double amount) {
        balance += amount;
    }

    public boolean withdraw(double amount) {
        if (balance >= amount) {
            balance -= amount;
            return true;
        } else {
            return false; // Insufficient funds
        }
    }
}

  class ATM {
     private BankAccount bankAccount;
     private Scanner scanner;

     public ATM(BankAccount bankAccount) {
         this.bankAccount = bankAccount;
         this.scanner = new Scanner(System.in);
     }

     public void start() {
         boolean running = true;
         while (running) {
             displayMenu();
             int choice = getUserChoice();

             switch (choice) {
                 case 1:
                     withdraw();
                     break;
                 case 2:
                     deposit();
                     break;
                 case 3:
                     checkBalance();
                     break;
                 case 4:
                     System.out.println("Thank you for using the ATM. Goodbye!");
                     running = false;
                     break;
                 default:
                     System.out.println("Invalid choice. Please enter a number between 1 and 4.");
             }
         }
         scanner.close();
     }

     private void displayMenu() {
         System.out.println("Welcome to the ATM:");
         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: ");
     }

     private int getUserChoice() {
         int choice = scanner.nextInt();
         scanner.nextLine(); // Consume newline character
         return choice;
     }

     private void withdraw() {
         System.out.print("Enter amount to withdraw: ");
         double amount = scanner.nextDouble();
         if (amount > 0) {
             if (bankAccount.withdraw(amount)) {
                 System.out.println("Withdrawal successful. Remaining balance: " + bankAccount.getBalance());
             } else {
                 System.out.println("Insufficient funds.");
             }
         } else {
             System.out.println("Invalid amount.");
         }
     }

     private void deposit() {
         System.out.print("Enter amount to deposit: ");
         double amount = scanner.nextDouble();
         if (amount > 0) {
             bankAccount.deposit(amount);
             System.out.println("Deposit successful. Updated balance: " + bankAccount.getBalance());
         } else {
             System.out.println("Invalid amount.");
         }
     }

     private void checkBalance() {
         System.out.println("Your current balance is: " + bankAccount.getBalance());
     }
 }
public class task3 {
    public static void main(String[] args) {
        BankAccount bankAccount = new BankAccount(1000); // Initial balance
        ATM atm = new ATM(bankAccount);
        atm.start();
    }
}