title: Adding comma separated strings to an ArrayList and vice versa
body: <p>How to add a comma separated string to an ArrayList? My string "returnedItems" could hold 1 or 20 items which I'd like to add to my ArrayList "selItemArrayList".</p>
  
  <p>After the ArrayList has been populated, I'd like to later iterate through it and format the items into a comma separated string with no spaces between the items.</p>