ExtraLoops

public class Hw3Ex
{

    /**
     * @param args
     */
    public static void main(String[] args)
    {
        Random rand = new Random();
        ArrayList<Integer> intlist1 = new ArrayList<Integer>();
        ArrayList<Integer> intlist2 = new ArrayList<Integer>();
        //populateLists(intlist1,rand);
        //populateLists(intlist2,rand);
        intlist1.add(1);
        intlist1.add(2);
        intlist2.add(3);

        System.out.println(intlist1);
        System.out.println(intlist2);
        interleave(intlist1,intlist2);
        interleave(intlist2,intlist1);
        System.out.println(intlist1);
        System.out.println(intlist2);


    }

    public static void interleave(ArrayList<Integer> intlist1, ArrayList<Integer> intlist2)
    {
        int rightslot = 0, firstslot = 1, size = intlist2.size();

        for(int i = 0; i < size; i++)
        {

            intlist1.add(firstslot, intlist2.get(i));

            rightslot = (intlist1.size() - 1) - (firstslot + 2);
            System.out.println(rightslot);
            if(rightslot <= -2)
            {
                firstslot++;
            }
            else
            {
                firstslot += 2;
            }

        }
    }

    public static void populateLists(ArrayList<Integer> intlist, Random rand)
    {
        for(int i = 0; i < rand.nextInt(5) + 1; i++)
        {
            intlist.add(rand.nextInt(100) + 1);
        }
    }

}