Array list problems :s

Code:

---


public class Account

{
   
    private ArrayList<String> accountList;
 
    public Account()
    {
        // initialise instance variables
     
        accountList = new ArrayList<String>();
       
       
    }
   
   
    public void viewAvailableAccounts(){
       
        accountList = new ArrayList<String>();
        //Account accounts = new Account();
        accountList.add("Savings Account");
        accountList.add("Current Account");
        System.out.println(accountList);
     
     
    }

---

I am just trying to display the records in the Array list in the viewAvailableAccounts method and i get an error of "java.lang.NullPointerException
at Account.accountTypes(Account.java:30)". I have no idea why i get this error.

Any ideas please?

Which of the lines is 30? From a quick glance, it looks okay to me... Try moving the System.out.println(accountList) to above the accountList.adds. Shouldn't be a problem though...

Which of the lines is 30? From a quick glance, it looks okay to me... Try moving the System.out.println(accountList) to above the accountList.adds. Shouldn't be a problem though...

Although the line "public class Accountpublic class Account" looks odd to me. How did that even compile?

line 30 is simply me using the } symbol to close my other method and the "public class Accountpublic class Account" was jus a copy and paste mistake made by me.

Code:

---


import java.util.ArrayList;
/**
 * Write a description of class Account here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class Account
{
    // instance variables - replace the example below with your own
    private String accountName;
    private Integer accountNumber;
    private Integer sortCode;
    private Bank bank;
    private ArrayList<String> accountList;
   
    /**
    * Constructor for objects of class Account
    */
    public Account(String accountName, Integer accountNumber, Integer sortCode, Bank bankName)
    {
        // initialise instance variables
        this.accountName = accountName;
        this.accountNumber = accountNumber;
        this.sortCode = sortCode;
        bank = bankName;
        accountList = new ArrayList<String>();
       
       
    }
   
   
    public void viewAvailableAccounts(){
       
        accountList = new ArrayList<String>();
        //Account accounts = new Account();
        accountList.add("Savings Account");
        accountList.add("Current Account");
        System.out.println(accountList);
     
     
    }
 

    /**
    * An example of a method - replace this comment with your own
    *
    * @param  y  a sample parameter for a method
    * @return    the sum of x and y
    */
   
   
   
    }

---

this is the original code

Well, there's definitely something missing in the example... The exception says it should be in the accountTypes method in the Account class.

Could you post your entire stacktrace? It would look something like this:

Code:

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Exception in thread "main" java.lang.NullPointerException
        at test.splittest(test.java:19)
        at test.<init>(test.java:14)
        at test.main(test.java:9)

---

stacktrace? Sorry i'm kinda new what is a stacktrace?

Basically, the whole text you get when you get an exception like that. It should look a little like what I posted just above.

Don't worry, its working now. Cheers