Need help with username and password validation

[Sid Husawn]

Hey everyone. I was instructed to create an bank account program that mimics an atm. New users get added to a customers.txt file and I have to validate usernames and passwords from that same file. This is what I have so far.

public class Bank
{
	private String owner, password;
	private double balance;
	
	public Bank(String name, String pass, double bal)
	{
		owner=name;
		password=pass;
		balance=bal;
	}
	
	public Bank(double startBalance)
	{
		balance=startBalance;
	}
	
	public Bank(String str)
	{
		balance=Double.parseDouble(str);
	}
	
	public void setName(String name)
	{
		owner=name;
	}
	
	public String getName()
	{
		return owner;
	}
	
	public void setPassword(String pass)
	{
		password=pass;
	}
	
	public void setBalance(double b)
	{
		balance=b;
	}
	
	public void setBalance(String str)
	{
		balance=Double.parseDouble(str);
	}
	
	public double getBalance()
	{
		System.out.printf("Your current balance is $%4.2f\n", balance);
		return balance;
	}
	
	public void deposit(double amount)
	{
		balance+=amount;
	}
	
	public void deposit(String str)
	{
		balance+=Double.parseDouble(str);
	}
	
	public void withdraw(double amount)
	{
		if(amount>balance){
		System.out.println("Sorry insufficient funds");}
		else{balance-=amount;}
	}
	
	public void withdraw(String str)
	{
		balance-=Double.parseDouble(str);
	}
	
	public void showMenu()
	{
		System.out.println("Please select from the following: ");
		System.out.println("1. Check Balance\n2. Withdraw\n3. Deposit\n4. Exit");
	}
	
	public void exitMenu()
	{
		System.out.print("Thank you. Have a nice day");
	}
	
	public boolean validiateName(String x)
	{
		boolean status;
		
		if(x.equals(str)){
		status=true;}
		else{status=false;}
		
		return status;
	}
		
	
}
	
import java.util.Scanner;
import java.io.*;
import java.util.ArrayList;



public class BankTest
{
	public static void main(String[]args)throws IOException
	{
	
		int input;
		String name, pass, bal, str;
		double amount;
		
		ArrayList<Bank> nameList=new ArrayList<Bank>();
		
		Scanner kboard=new Scanner(System.in);
		Bank test=new Bank(0.0);
		
		
		System.out.println("Welcome.\n1. Login\n2. Open New Account");
		input=kboard.nextInt();
		
		
		
		if(input==2){	
		FileWriter fw=new FileWriter("customers.txt");
		PrintWriter outputFile=new PrintWriter(fw);
		
		
		System.out.print("Enter a Username: ");
		kboard.nextLine();
		name=kboard.nextLine();
		outputFile.println(name+" ");
					
		System.out.print("Enter a Password: ");
		pass=kboard.nextLine();
		outputFile.println(pass+" ");
			
		System.out.print("Enter starting balance: ");
		amount=kboard.nextDouble();
		outputFile.println(amount+" ");
		nameList.add(new Bank(name,pass,0.0));
			
		outputFile.close();
		
		
		}
			
		if(input==1)  // VALIDATE USERNAME AND PASSWORD
		{
			kboard.nextLine();
			System.out.print("Enter Username: ");
			String x=kboard.nextLine();
			System.out.print("Enter Password: ");
			String y=kboard.nextLine();
			
			FileReader fr=new FileReader("customers.txt");
			BufferedReader inputFile=new BufferedReader(fr);
			
			str=inputFile.readLine();
			while(str!=null){
			str=inputFile.readLine();
			
							
		
		}
		
		
		
		do{
		test.showMenu();
		input=kboard.nextInt();
		switch(input)
		{
			case 1:
				test.getBalance();
				kboard.nextLine();
				break;
			case 2:
				System.out.print("How much would you like to withdraw? ");
				kboard.nextLine();
				amount=kboard.nextDouble();
				test.withdraw(amount);
				break;
			case 3:
				System.out.print("How much would you like to deposit? ");
				amount=kboard.nextDouble();
				test.deposit(amount);
				break;
			case 4:
				test.exitMenu();
				break;
		}}while(input!=4);
		}
		
		
		
	}
}

Thanks any help appreciated

[Rahul Sudip Bose]

It is very difficult to read and fully understand so much code that has no description. Please describe it in detail - tell what the classes do, basic logic of methods etc. It will make analysis easy.

[Greg Brannon]

And describe what you need help with. What's not working? If you're getting error messages, post them exactly (cut and paste). If the code is not functioning as you'd like, post examples of what you want it to do and actual results from running the code that show how it does not agree with your specification, cut and past if possible.

Since the assignment requires a file of customer usernames and passwords, you need to define the format of the customer.txt file and then read it into a collection of some kind. Then, when a returning ATM user enters their username and password, the customer collection can be searched for an existing username and corresponding password to validate the user's logon. If a new customer, the new ussername and password will be added to the customer collection. The customer.txt file can be updated, written from the customer collection, after each customer logoff or before the ATM shuts down.

[Abhay Agarwal]

Hi Sid

Welcome to JavaRanch !!!

Just mention what errors you are getting in your application. Then only fellow members of this forum may help you in removing those errors.

~ abhay