Thread: what is wrong with my code

when I create an instance of the ticket class and call the method print ticket, it comes up with this,
sss.jpg

this is my code

import java.util.ArrayList;
/**
 * lucky dip lottery ticket system.
 * 
 * @author (Daniel Prempeh) 
 * @version 1.1 2013
 */
public class Ticket
{
    //array list store instances of number class
    private ArrayList<Numbers> lottoticket;
    private int qty;
 
    public Ticket(int numOfLines)
    {
        lottoticket = new ArrayList<Numbers>();
        //needs a loop
        for(int i=0; i<qty; i++)
        {
            lottoticket.add(new Numbers());
        }
    }
 
    //print out ticket
    public void printTicket()
    {
        //printout header of ticket 
        System.out.println("******************************");
        System.out.println("**                          **");
        System.out.println("**         Ticket           **");
        System.out.println("**                          **");
        System.out.println("******************************");
        //detail
        //needs a loop
        lottoticket.get(0).print();
        //printout footer of ticket
        System.out.println("******************************");
    }
}

the fault occurs with lottoticket.get(0).print();
and on the terminal it says...

java.lang.indexoutofboundsexception: index 0, size 0

at java.util.arraylist.rangecheck(arraylist.java:604)
at java.util.arraylist.get(arraylist.java:382)
at ticket.printticket(ticket.java:35)

ava.lang.indexoutofboundsexception: index 0, size 0
at java.util.arraylist.rangecheck(arraylist.java:604)
at java.util.arraylist.get(arraylist.java:382)
at ticket.printticket(ticket.java:35)

If the arraylist is empty(size = 0) there is no first element(index = 0)

Look at line 35 in the code to see why it expects there to be an element in the arraylist.
How many elements were added to the arraylist? Add some println statements to print out the values of the variables used to control the loops and to show where the code is executing. Does the code in the loop ever execute?

lottoticket.get(0).print()

lottoticket is empty. There is no first element (0)