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.ExceptionInInitializerError
Caused by: java.lang.NullPointerException
at sun.misc.FloatingDecimal.readJavaFormatString(Floa tingDecimal.java:991)
at java.lang.Double.parseDouble(Double.java:510)
at javaapplication3.Main.<clinit>(Main.java:18)
Could not find the main class: javaapplication3.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.parseDouble(balance);
private static double Overdraft = Double.parseDouble(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,Overdraft;

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