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  1. #1
    ihmflu is offline Member
    Join Date
    Mar 2012
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    Thumbs down Need help for a Java homework mimic ATM Machine .

    write a java program using classes to mimic an ATM of a bank.

    The interactions are done with a menu.
    Save every accounts info in a text file using FileWriter and PrintWriter. Every withdrawal costs 20 cents.
    Sample MENU:
    what do you want to do today?
    1.create a new account
    2.deposit into an existing account
    3.withdraw from an existing account
    4.check balance of an existing account
    5.print Summary of transactions

    Sample text file:
    Name: JOE , Balance = 120.80 $
    You have deposited 2 times with the amount of 10$
    You have withdraw 1 times with the amount of 5$
    You were charged 0.20$

    Name: Bob , Balance = 80.60 $
    You have deposited 2 times with the amount of 20$
    You have withdraw 2 times with the amount of 7$
    You were charged 0.40$

    So here is what I got for my main and class:

    // class
    import java.util.*;
    import java.text.*;

    public class ATM
    double input;
    double balance, withdraw, deposit;
    int number;
    double Deposit;
    double totalDeposit;
    double totalWithdraw;
    double totalCharge;
    int countDeposit;
    int countWithdraw;
    double charge;

    public String createAccount() throws IOException
    String account;
    Scanner kb = new Scanner(;
    System.out.print("Enter an account name you want to create.");
    account = kb.nextLine();
    System.out.println("Your account has been created. ");

    return account;

    public void deposit(double dep)

    balance += dep;
    countDeposit +=1;
    totalDeposit += dep;

    public void withdraw(double w)

    totalWithdraw +=w;
    balance -=0.20;
    balance -=w;
    charge += 0.20;

    public double getBalance()
    return balance;

    public void setBalance(double sb)
    balance = sb;
    public double getCountDeposit()
    return countDeposit;
    public double getCountWithdraw()
    return countWithdraw;
    public double gettotalDeposit()
    return totalDeposit;
    public double getCharge()
    { return charge;

    public double gettotalWithdraw()
    return totalWithdraw;


    This is my main :

    import java.util.*;
    import java.text.*;
    public class ATMTest
    public static void main(String[] args) throws IOException
    int number;

    DecimalFormat formatter = new DecimalFormat("#,###.00");
    ATM account = new ATM();

    Scanner kb = new Scanner(;

    System.out.println("WELCOME! WHAT DO YOU WANT TO DO TODAY");

    System.out.println("1.create a new account");
    System.out.println("2.deposit into an existing account");
    System.out.println("3.withdraw from an existing account");
    System.out.println("4.check balance of an existing account");
    System.out.println("5.print Summary of transactions");
    System.out.println("6.exit ");
    number= kb.nextInt();

    if(number ==1)
    String newAccount = account.createAccount();
    else if (number == 2)

    { System.out.println("How much do you want to deposit?");
    double deposit = kb.nextDouble();

    else if (number == 3)
    System.out.println("How much do you want to withdraw?");
    double withdraw = kb.nextDouble();

    if (withdraw > account.getBalance()){
    System.out.println("You don't have enough money to withdraw");


    else if (number == 4)

    System.out.println("Your balance is" + account.getBalance());

    else if (number == 5)
    System.out.println("your balance is");
    System.out.println("$" +account.getBalance());
    System.out.println("you have deposit: ");
    System.out.print(account.getCountDeposit() + "times");
    System.out.println("you have withdraw: ");
    System.out.println(account.getCountWithdraw()+ " times");
    System.out.println("you have deposit: ");
    System.out.println("$" + account.gettotalDeposit() );
    System.out.println("You have withdraw: ");
    System.out.println("$" +account.gettotalWithdraw() );
    System.out.println(" You were charged: ");
    System.out.println("$" + account.getCharge() );
    else if (number == 6)

    } //while loop

    } //class

    It worked well but the thing is I don't know how to save the account to a text file and how to access to an existing account from the file. Can anyone please help?

  2. #2
    ojn is offline Senior Member
    Join Date
    Aug 2008
    Stockholm, Sweden
    Rep Power

    Default Re: Need help for a Java homework mimic ATM Machine .

    Google search: Java read write file
    Also, put your code in CODE tags, if you want anyone to read it. And finally, ask a specific question. "How do I do.." is not one.

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