MiniATM.java

import java.util.Scanner;

class Account {
    private String accountNumber;
    private String accountHolderName;
    private double balance;

    // Constructor
    public Account(String accountNumber, String accountHolderName, double balance) {
        this.accountNumber = accountNumber;
        this.accountHolderName = accountHolderName;
        this.balance = balance;
    }

    // Deposit Method
    public void deposit(double amount) {
        if (amount > 0) {
            balance += amount;
            System.out.println("Deposit Successful!");
            System.out.println("Updated Balance: ₹" + balance);
        } else {
            System.out.println("Invalid Deposit Amount!");
        }
    }

    // Withdraw Method
    public void withdraw(double amount) {
        if (amount <= 0) {
            System.out.println("Invalid Withdrawal Amount!");
        } else if (amount > balance) {
            System.out.println("Insufficient Balance!");
        } else {
            balance -= amount;
            System.out.println("Withdrawal Successful!");
            System.out.println("Remaining Balance: ₹" + balance);
        }
    }

    // Balance Check Method
    public void checkBalance() {
        System.out.println("Account Holder: " + accountHolderName);
        System.out.println("Account Number: " + accountNumber);
        System.out.println("Current Balance: ₹" + balance);
    }
}

public class MiniATM {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.println("===== MINI ATM MACHINE SYSTEM =====");

        // Taking account details
        System.out.print("Enter Account Number: ");
        String accNo = sc.nextLine();

        System.out.print("Enter Account Holder Name: ");
        String name = sc.nextLine();

        System.out.print("Enter Initial Balance: ");
        double balance = sc.nextDouble();

        Account account = new Account(accNo, name, balance);

        int choice;

        do {
            System.out.println("\n===== ATM MENU =====");
            System.out.println("1. Deposit");
            System.out.println("2. Withdraw");
            System.out.println("3. Check Balance");
            System.out.println("4. Exit");
            System.out.print("Enter your choice: ");

            choice = sc.nextInt();

            switch (choice) {
                case 1:
                    System.out.print("Enter amount to deposit: ");
                    double depositAmount = sc.nextDouble();
                    account.deposit(depositAmount);
                    break;

                case 2:
                    System.out.print("Enter amount to withdraw: ");
                    double withdrawAmount = sc.nextDouble();
                    account.withdraw(withdrawAmount);
                    break;

                case 3:
                    account.checkBalance();
                    break;

                case 4:
                    System.out.println("Thank you for using Mini ATM!");
                    break;

                default:
                    System.out.println("Invalid Choice! Please try again.");
            }

        } while (choice != 4);

        sc.close();
    }
}