Could not find the main class: javaapplication3.Main

[trdmrk]

Hello,

Ive found this site very helpful in the past, so i thought i may ask for help.

I am developing an application for a school project. I am in the middle of it, I get the error: java.lang.Excep tionInInitializ erError
Caused by: java.lang.NullP ointerException
at sun.misc.Floati ngDecimal.readJ avaFormatString (FloatingDecima l.java:991)
at java.lang.Doubl e.parseDouble(D ouble.java:510)
at javaapplication 3.Main.<clinit> (Main.java:18)
Could not find the main class: javaapplication 3.Main. Program will exit.
Exception in thread "main" Java Result: 1

It cannot find the main class, ive tried everything i can think of and a fair bit of looking around on the net for solutions but to no avail.

its pretty urgent as i cant proceed because i cant test, any help would be much appreciated!

package ChadstoneCommunityBank;

import javax.swing.*;
import java.util.ArrayList;

public class main {

        private static ArrayList<ChequeAccount> ChequeAccount = new ArrayList<ChequeAccount>();
        private static  ArrayList<InvestmentAccount> InvestmentAccount = new ArrayList<InvestmentAccount>();
        private static ArrayList<PassbookAccount> PassbookAccount = new ArrayList<PassbookAccount>();
        private static String name, address, balance, overdraft;
        private static double Balance = Double.parseDouble(balance);
        private static double Overdraft = Double.parseDouble(overdraft);

   public static void main(String[] args)

       int choice = mainMenu(); //Menu System
		while(choice != 8)
		{
			switch(choice)
			{
				case 1:
					createAccount();
					break;
				case 2:
					//addStudent();
					break;
				case 3:
					//printDetails();
					break;
                case 4:
					//createSubject();
					break;
				case 5:
					//addInterest();
					break;
				case 6:
					//printDetails();
					break;
                case 7:
					//createSubject();
					break;
				default:
					JOptionPane.showMessageDialog(null, "Not a valid option, select again");

			}
			choice = mainMenu();
		}
		System.exit(0);
	}
//-----------------------------------------------------------------------------------------------------------------------------------------------
	public static int mainMenu()
	{
		String displayMenu;
		displayMenu = JOptionPane.showInputDialog(null, "1.   Add New Account\n2.   Withdraw\n3.   Deposit\n4.   Update Overdraft\n5.   Add Interest\n6.   Print Balance\n7.   Print All\n8.   Quit\n\nEnter Your Option (Enter 8 to quit):");
		int temp = validateMenuInput(displayMenu);
		return temp;
	}

//------------------------------------------------------------------------------------------------------------------------------------------------
            public static int validateMenuInput(String aString)
	{
		if (aString.length()<1 || aString==null)//User didnt Enter a selection
		{
			JOptionPane.showMessageDialog(null,"Not A Valid Option, Please Input a Number!");
			return 0;
		}
		else
			if(!Character.isDigit(aString.charAt(0))||(aString.length()>1)) //User Entered a Character
			{
				JOptionPane.showMessageDialog(null,"Not An Valid Option, Please Input a Number!");
				return 0;
			}
			else
				return (Integer.parseInt(aString));

	}

//-------------------------------------------------------------------------------------------------------------------------------------------------------

       //  public static double addInterest(double rate)
       //  {
         //    balance = BankAccountgetBalance();
         //    balance = balance * (1 + (rate/100.0));
             
         //    return balance;
        // }
 

//-------------------------------------------------------------------------------------------------------------------------------------------------------
//Create Account Menu
        public static void createAccount()
        {
               int choice = addAccount(); //Menu System
		while(choice != 3)
		{
			switch(choice)
			{
				case 1:
					createChequeAccount();
					break;
				case 2:
					createPassbookAccount();
					break;
				case 3:
					createInvestmentAccount();
					break;
                             
				default:
					JOptionPane.showMessageDialog(null, "Not a valid account type, Please try again");

			}
			choice = addAccount();
		}

        }

       public static int addAccount()
	{
		String displayMenu;
		displayMenu = JOptionPane.showInputDialog(null, "1.   Cheque Account\n2.   Passbook Account\n3.   Investment Account");
		int temp = validateMenuInput(displayMenu);
		return temp;
	}

//------------------------------------------------------------------------------------------------------------------------------------------------
//Create Account Methods
       public static void createChequeAccount()
       {
                //Ask for New account information
                name = JOptionPane.showInputDialog(null, "Enter Account Holders Name");
                address = JOptionPane.showInputDialog(null, "Enter Account Holders Address");
                balance = JOptionPane.showInputDialog(null, "Enter Opening Balance");
                overdraft = JOptionPane.showInputDialog(null, "Enter Overdraft Amount");

                //Add account to Array
			ChequeAccount ca = new ChequeAccount(name, address, Balance, Overdraft);
			ChequeAccount.add(ca);
                //Display New account information
                        int size = ChequeAccount.size()-1;
                        JOptionPane.showMessageDialog(null, "Account information" + ChequeAccount.get(size));
       }

       public static void createPassbookAccount()
       {
                //Ask for New account information
                name = JOptionPane.showInputDialog(null, "Enter Account Holders Name");
                address = JOptionPane.showInputDialog(null, "Enter Account Holders Address");
                balance = JOptionPane.showInputDialog(null, "Enter Opening Balance");

                //Add account to Array
			PassbookAccount pa = new PassbookAccount(name, address, Balance);
			PassbookAccount.add(pa);
       }

       public static void createInvestmentAccount()
       {
                //Ask for New account information
                name = JOptionPane.showInputDialog(null, "Enter Account Holders Name");
                address = JOptionPane.showInputDialog(null, "Enter Account Holders Address");
                balance = JOptionPane.showInputDialog(null, "Enter Opening Balance");

                //Add account to Array
			InvestmentAccount ia = new InvestmentAccount(name, address, Balance);
			InvestmentAccount.add(ia);
       }

//---------------------------------------------------------------------------------------------------------------------------------------------------


}

[jkmyoung]

The initialization of your variables are wrong:

private static String name, address, balance, overdraft;
private static double Balance = Double.parseDou ble(balance);
private static double Overdraft = Double.parseDou ble(overdraft);

balance and overdraft have not been set, so they will throw errors when the program is run.

Suggestion:
declare the double s but do not set them yet:
private static double Balance,Overdra ft;

whenever you change balance and overdraft, set Balance and Overdraft respectively.