This Util Class holds a method that converta an ArrayList to
to Comma Separated String.

public class CommaDelimetedStringToList {
    /**
     * This method strips out the comma from the comma delimited value
     * @param commaDelimitedValue
     * @return ArrayList
     */
    public static ArrayList commaDelimetedStringToList (String commaDelimitedValue){
     commaDelimitedValue = commaDelimitedValue.trim();
     ArrayList list = new ArrayList();
     if (commaDelimitedValue.indexOf(",") > 0){
         StringTokenizer st = new StringTokenizer(commaDelimitedValue,",");
         while (st.hasMoreTokens()){
          list.add(st.nextToken());
         }
     } else {
      list.add(commaDelimitedValue);
     }
     return list;
    }
   
}

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