BartMansss

Does anyone here know Java!!??

This is doing my head in. I have a very simple program looking like this:

import java.util.ArrayList;

public class Menu
{

private ArrayList items;
private ArrayList prices;

//Constructor
public Menu()
{

items = new ArrayList();
prices = new ArrayList();
String[] items = {"Pizza","Bread","Beans","Large Pizza","Small Pizza"};
double[] prices = {12.99,2.00,1.99,13.99,10.99};
}

//Methods

public void newItem(String item)
{
items.add(item);
}

public void getMenuItemDescription (int itemNumber)
{
System.out.println(items.get(itemNumber));

}

public void getMenuItems()
{
int count = 0;
while (count <= items.size())
{
System.out.println(items.get(count));
count++;
}
}

public void getMenuItemPrice(int itemNumber)
{
System.out.println(prices.get(itemNumber));
}

}

It compiles fine, but when I go to access any of the variables in either array, it crashed with an error message saying IndexOutOfBoundsException

I'm obviously doing something fundamnetaly wrong! Any ideas?

Thanks in advance

Abramovic

Is this the only class you have? As there is no main method in this class.

As far as other problems are concerned, your not adding the Sting or double array items into ArrayLists items or prices. So just to be on the safe side try using a for loop to add things.

Abramovic

Sorry to double post but you could try to convert the arrays into ArrayLists

Example:

// converting an array to an ArrayList, without Generics
String[] animals = { "bear", "cougar", "wolverine"};
ArrayList al = new ArrayList( Arrays.asList( animals ) );

// converting an ArrayList to an array without generics,
String[] predators = (String[])al.toArray( new String[ al.size() ] );

BartMansss

Christ im confused

In case you didnt guess programming is not my forte

JK Galgreefe

i don't get what you're trying to do with it to be honest. if you're trying to map the prices to the items wouldn't you be better off using a HashMap or an enum or something?