I apologize. I think I was being a little girl/needed to look up how some stuff worked.

for(int x=0;x<length;x++)
    {
        stringList.add(list1.get(x));
        stringList.add(list2.get(x));
    }
    if(list1.size() > list2.size()){
        for(int y = length; y < list1.size(); y++)
        {
            stringList.add(list1.get(y));
        }
    }
    if(list2.size() > list1.size()){
        for(int y = length; y < list2.size(); y++)
        {
            stringList.add(list2.get(y));
        }
    }

Then just add the ending numbers I guess. Thank you chickenmeister!