Thread: Help with programe please

Does you new code work ok?

use the highlight=java tags or the code tags so it is easier to read your code. I may be able to help you if it is easier to read.

yes the new code does not come with any errors but i am not sure how to return the object back. i am sorry but i not sure which tag that aussiemcgr is talking about.

I didn't look at the code in detail at all, but I see this:


//THIS IS THE ERROR I AM GETTING "Cannot instantiate the type BankAccount"

BankAccount acc = new BankAccount(name, amount);

...

public abstract class BankAccount {

...

If the class is abstract, you can't create an object of that class. You need to extend that class and implement the abstract methods first.

i am not sure how to return the object back

Can you show the code where you are having this problem?

 
import java.util.List;
 
 
public class BankManager implements _BankManager
{
 
	public BankAccountOutputVO ViewAccountSummary(String accountNumber)
	{
		// TODO Auto-generated method stub
		return null;
	}
 
	public BankAccountOutputVO closeAcount(String accountNumber)
	{
		// TODO Auto-generated method stub
		return null;
	}
 
	public BankAccountOutputVO createNewCurrentAccount(String name,
			double amount, double overdraftLimit)
	{
		CurrentAccount acc = new CurrentAccount(name, amount, overdraftLimit);
		// i am getting the error here.
		return accl;
	}
 
	public BankAccountOutputVO createNewSavingsAccount(String name,
			double amount)
	{
		// TODO Auto-generated method stub
		return null;
	}
 
	public List<BankAccountOutputVO> listAllAccounts()
	{
		// TODO Auto-generated method stub
		return null;
	}
 
	public BankAccountOutputVO makeDeposit(String accountNumber, double amount)
	{
		// TODO Auto-generated method stub
		return null;
	}
 
	public BankAccountOutputVO makeWithdrawal(String accountNumber,
			double amount)
	{
		// TODO Auto-generated method stub
		return null;
	}
 
}

i am getting the error here.

What is the error? Please post full text.

This is the error from the compile
"Type mismatch: cannot convert from CurrentAccount to BankAccountOutputVO" the thing i am not sure about is what to call back. Thank you for ur help

Please post full text.
Please copy full text of error message and paste it here. Here is a sample:

TestSorts.java:138: cannot find symbol
symbol  : variable var
location: class TestSorts
         var = 2;
         ^

i am using eclipse and there there is not more information. thanks you.

For tags, parse your code with the highlight wrap, put this before your code (I'm going to use * to represent [ and ] since I dont know how to stop parsing) *highlight=java* and this after your code */highlight*. And your code will look nice and colorful.

Lets break it down. The error is specificially occuring here:

public BankAccountOutputVO createNewCurrentAccount(String name,
			double amount, double overdraftLimit)
	{
		CurrentAccount acc = new CurrentAccount(name, amount, overdraftLimit);
		// i am getting the error here.
		return accl;
	}

You should be getting a problem when you are trying to return accl, seeing how that variable doesnt exist.

However, I assume you mean to return acc, so the reason your getting this issue is because CurrentAccount is a BankAccount and BankAccountOutputVO is not. You are saying you want to return a BankAccountOutputVO object, but you are attempting to return a CurrentAccount object. By the looks of it, a BankAccount Object is just a BankAccountOutputVO Object with added methods. I'm not sure about your assignment specificiations, but can you make BankAccount extend BankAccountOutputVO? I actually dont even see the point in having any BankAccountOutputVO Objects.

Why not have that method create and return what it is supposed to:

public BankAccountOutputVO createNewCurrentAccount(String name,
            double amount, double overdraftLimit)
    {
        BankAccountOutputVO acc = new BankAccountOutputVO(.....);
         return acc;
    }

Can you post the full error text and the code that is causing it?
before you said the error was a mismatch, now you say its a null pointer exception.
One is at compile time the other at execution time.

Thanks Guys for you help i managed to solve that problem. I was wondering how to save my new accounts in a list so i could manage these accounts. thank you.

Is this problem solved?
If so, please mark this thread as solved.

one of the problem is solved i am just trying to create an array list to store all the account if you could give me some addvice on these. Thanks

The are many code examples online. Use a Search to find some.
Basically you create an ArrayList object and use its add() method to add objects to it.

Thanks for all your help. i started to understand the basics of java programming now.

Hi i have written this code but i am not sure how to add the imformation from the interface to the arraylist

package com.fdm.bank;
 
import java.util.ArrayList;
 
public class Storage {
 
	private ArrayList<Integer> CurrentAccount = new ArrayList<Integer>();
 
	public void add(int number) {
		CurrentAccount.add(number);
	}
 
	public ArrayList<Integer> getList() {
		return CurrentAccount;
	}
 
}

package com.fdm.bank;
import java.util.ArrayList;
import java.util.List;
 
public class BankManager implements _BankManager {
 
	public BankAccountOutputVO ViewAccountSummary(String accountNumber) {
		// TODO Auto-generated method stub
		return null;
	}
 
	public BankAccountOutputVO closeAcount(String accountNumber) {
		// TODO Auto-generated method stub
		return null;
	}
 
	public BankAccountOutputVO createNewCurrentAccount(String name,
			double amount, double overdraftLimit) {
		// long accNumber = BankAccount.randomAccNo();
		CurrentAccount currentAcc = new CurrentAccount(name, amount,
				overdraftLimit);
 
		BankAccountOutputVO bao = new BankAccountOutputVO(currentAcc
				.getAccountNumber()
				+ "", currentAcc.getAccountType(), currentAcc.getName(),
				currentAcc.getOverdraft() + "", currentAcc.getAmount() + "",
				true);
 
		return bao;
 
	}
 
	public BankAccountOutputVO createNewSavingsAccount(String name,
			double amount) {
		SavingAccount savingAcc = new SavingAccount(name, amount, amount);
 
		BankAccountOutputVO bao = new BankAccountOutputVO(savingAcc
				.getAccountNumber()
				+ "", savingAcc.getAccountType(), savingAcc.getName(),
				savingAcc.getOverdraft() + "", savingAcc.getAmount() + "", true);
 
		return bao;
	}
 
	public List<BankAccountOutputVO> listAllAccounts() {
 
		Storage BankAccount = new Storage();
 
		BankAccount.add(5);
 
		ArrayList<Integer> list = BankAccount.getList();
 
		for (Integer counter : list) {
			System.out.println(counter);
		}
 
		return null;
 
	}
 
	public BankAccountOutputVO makeDeposit(String accountNumber, double amount) {
		// TODO Auto-generated method stub
		return null;
	}
 
	public BankAccountOutputVO makeWithdrawal(String accountNumber,
			double amount) {
		// TODO Auto-generated method stub
		return null;
	}
 
}

how to add the imformation from the interface to the arraylist

Can you explain where your problem is?
What is the information?
what is the interface?