How do I create a method to grab a random value from another class?

I am trying to randomly grab integers from another class and cannot figure out how to get those values. The first class is my initial random number generator. The second class is the class I am trying to retrieve these numbers to. I have created a grab method but cannot figure out how to retrieve these random integers from class ArrayBag. Any help would be appreciated!

import java.util.Random;

public final class ArrayBag<T> implements BagInterface<T>
{
    private final T[] bag; 
    private int numberOfEntries;
    private boolean initialized = false;
    private static final int DEFAULT_CAPACITY = 6;
    private static final int MAX_CAPACITY = 10000;

    /** Creates an empty bag whose initial capacity is 6. */
    public ArrayBag() 
    {
        this(DEFAULT_CAPACITY);
        System.out.print("Generating 6 random integers 1 - 6 in   ArrayBag\n");      

        //Random loop to generate random numbers 1 to 6
        Random rand = new Random();
        for(int start=1; start <=6; start++)
        {
            int randInt = rand.nextInt(6);
            System.out.println("Generated : " + randInt);
        }
        System.out.println("Finished\n");

    } // end default constructor

This is my second class and method...

import java.util.Random;

public class PopulationBag
{
    public PopulationBag()
    {
        ArrayBag ab = new ArrayBag();
        LinkedBag lb = new LinkedBag();

    }

    /**
    * Grab Method
    */

    public int grab()
    {
        ArrayBag ab = new ArrayBag();
        Random grab = new Random();
        for(int start = 1; start <= 6; start++)
        {
            int randGrab = grab.nextInt(ab);
            System.out.println("Randomly grabbed values : " + randGrab);
        }
    }

}