Java finish candidate (edition 3) again

//Name: Rob H
//Date: 05/03/2011
//Desc: FINAL
/*
CHECKLIST
do these in order.
[x] Works!!
[ ] Indentation.
[x] Documentation everywhere.
[ ] Fiddle around with the security for the prefixes
*/
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import javax.swing.*;


public class AtmHerman
{
/*
CHECKLIST
[x] array of objects
[x] ask for account number (ask for "debit card") + convert to int.
[x] compare ^ to CheckingAccountCustomer object's accountNo
[x] ask for PIN
[x] compare pin.
[x] 3 chances then quit.
[x] interface, date + time, d/w/c/q
[x] from this, call the appropriate CheckingAccountCustomer class
[x] loop to let customer perform another action.
[a little] innovation
*/
    public static void main(String[] args)
    {
        int cleared = 0;

        //Have to use two arrays for this.
        int[] acc = {0,11112222, 22223333, 33334444};
        int[] pin = {0,1111, 2222, 3333};
        //Ask user for account num "insert card"
        String input1 = JOptionPane.showInputDialog("Please insert card (8 numbers): ");
        int convert1 = Integer.parseInt(input1);
        //Now that we have a number, compare it to acc[]
        int match = 0;
        int position = 0;
        for (int i = 0; i < 4; i++)
        {
            if (convert1 == acc[i])
            {
                position = i;
            }
            else
            {
                //nothing
            }
        }
        //REMOVE ONCE CONFIRMED WORKING (the two lines below)
        System.out.println("position=" + position + "  acc[position]=" + acc[position]);
        System.out.println("pin should be: " + pin[position]);
        //If position = 0, end program.
        if (position == 0)
        {
            System.out.println("Account number invalid.  Please contact your bank.");
            System.exit(0);
        }
        //Ask for pin.
        String input2 = JOptionPane.showInputDialog("Please enter pin (4 numbers): ");
        int convert2 = Integer.parseInt(input2);
        //Loop.  If it fails, close the program.
        int Three_Strikes = 0;
        for (int lol = 0; cleared < 1; lol++) //there's probably a better way to do this.
        {
            if (convert2 == pin[position])
            {
                cleared = 1;
            }
            else
            {
                Three_Strikes = Three_Strikes + 1;
                //REMOVE ONCE CONFIRMED WORKING (the one line below)
                System.out.println("Three_Strikes=" + Three_Strikes);
                if (Three_Strikes == 3)
                {
                    System.exit(0);
                }
                input2=JOptionPane.showInputDialog("PIN does not match.  Please try again.");
                convert2 = Integer.parseInt(input2);
            }
        }
        //REMOVE ONCE CONFIRMED WORKING (the one line below)
        System.out.println("cleared = " + cleared);

        //bogus information for every account
        String a = "Curly Brace";
        double b = 100.01;




        CheckingAccountCustomer cust = new CheckingAccountCustomer("Curly Brace", 2222, 100.01, 12341234);



        //interface
        String loop = "";
        while (loop != "Q")
        {
            loop = JOptionPane.showInputDialog(AtmHerman.getDateTime() + "\nWelcome " + cust.getName() + ".\n(D)eposit Money\n(W)ithdraw Money\n(C)heck Account Balance\n(Q)uit");
            loop = loop.toUpperCase();
            if (loop.equals("D"))
            {
                cust.deposit();
            }
            else if (loop.equals("W"))
            {
                cust.withdraw();
            }
            else if (loop.equals("C"))
            {
                cust.checkBalance();
            }
            else if (loop.equals("Q"))
            {
                System.out.println("Goodbye!");
                cust.quit();
            }    //Exit the program.
            else
                System.out.println("Input Error");
        }
    }


    //Date and time.
    private static String getDateTime()
    {
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_NOW);
        return sdf.format(cal.getTime());
   }
        public static final String DATE_FORMAT_NOW = "yyyy-MM-dd HH:mm";
}



abstract class Customer
{
/*
CHECKLIST
[x]data fields name pin balance
[x]3 accessor methods (return) getName() returns <i>name</i>
[x]1 constructor method, name pin balance
[x]4 abstract (deposit ... ... exit)
*/
    //Declare variables.
    String name = "";
    int pin = 0;
    double balance = 0.0;
    //Constructor
    public Customer(String n, int p, double b)
    {
        name = n;
        pin = p;
        balance = b;
    }

    public Customer()
    {
        name = "";
        pin = 0;
        balance = 0.0;
    }

    //Accessors
    public String getName()
    {
        return name;
    }
    public int getPin()
    {
        return pin;
    }
    public double getBalance()
    {
        return balance;
    }

    //These don't do anything until they get inherited.
    //deposit(), withdraw(), checkBalance(), and quit().
    abstract public void deposit();

    abstract public void withdraw();

    abstract public void checkBalance();

    abstract public void quit();

}

class CheckingAccountCustomer extends Customer
{
/*
CHECKLIST
[x]Data field?  accountNo
[x]return getAccountNo method
[x]constructor name pin balance accountNo
[x]deposit: Prompt a customer to enter an amount of money to be deposited into his/her account.  Add this amount to the balance and print the current balance as of the current date/time to the screen.
[x]withdraw: Prompt a customer to enter an amount of money to withdraw from account.  Deduct this amount to the balance and print the current balance as of the current date/time to the screen.
[x]checkBalance: This method just prints the current balance as of the current date/time to the screen.
[x]quit: duh.  System.exit(0);
    */
    int accountNo = 0;

    //Constructor
    public CheckingAccountCustomer(String n, int p, double b, int a)
    {
        super(n, p, b);
        accountNo = a;
    }

    public void deposit()
    {
        String input3 = JOptionPane.showInputDialog("How much are you depositing?  ");
        double convert3 = Double.parseDouble(input3);
        balance = balance + convert3;
        System.out.println("As of " + CheckingAccountCustomer.getDateTime() + " your balance is " + balance);
    }

    public void withdraw()
    {
        String input4 = JOptionPane.showInputDialog("How much are you withdrawing?  ");
        double convert4 = Double.parseDouble(input4);
        balance = balance - convert4;
        if(balance < 0)
        {
            balance = balance + convert4;
            System.out.println("Insufficient funds.");
        }
        else
        {
            System.out.println("As of " + CheckingAccountCustomer.getDateTime() + " your balance is " + balance);
        }
    }

    public void checkBalance()
    {
        System.out.println("As of " + CheckingAccountCustomer.getDateTime() + " your balance is " + balance);
    }

    public void quit()
    {
        System.exit(0);
    }

        //Date and time.
    private static String getDateTime()
    {
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_NOW);
        return sdf.format(cal.getTime());
   }
        public static final String DATE_FORMAT_NOW = "yyyy-MM-dd HH:mm";
}