code: private long[] getUsersListMembers(String[] tUserlists) {
          logger.debug("Fetching user id of given lists");
          List<Long> listUserIdToFollow = new ArrayList<Long>();
          Configuration cb = buildTwitterConfiguration();
          Twitter twitterImpl = new TwitterFactory(cb).getInstance();
  
          //For each list given in parameter
          for (String listId : tUserlists) {
              logger.debug("Adding users of list {} ",listId);
              String[] splitListId = listId.split("/");
              try {
                  long cursor = -1;
                  PagableResponseList<User> itUserListMembers;
                  do {
                      itUserListMembers = twitterImpl.getUserListMembers(splitListId[0], splitListId[1], cursor);
                      for (User member : itUserListMembers) {
                          long userId = member.getId();
                          listUserIdToFollow.add(userId);
                      }
                  } while ((cursor = itUserListMembers.getNextCursor()) != 0);
  
              } catch (TwitterException te) {
                  logger.error("Failed to get list members for : {}", listId, te);
              }
          }
  
  
          //Just casting from Long to long
          long ret[] = new long[listUserIdToFollow.size()];
          int pos = 0;
          for (Long userId : listUserIdToFollow) {
              ret[pos] = userId;
              pos++;
          }
          return ret;
      }
docs: Get users id of each list to stream them.
  @param tUserlists List of user list. Should be a public list.
  @return