private ArrayList<RoomSummary> fillList(ArrayList<RoomSummary> list,RoomSummary value,int count){
  for (int i=0; i < count; i++) {
    list.add(value);
  }
  return list;
}

private ArrayList < RoomSummary > fillList ( ArrayList < RoomSummary > list , RoomSummary value , int count ) { for ( int i = 0 ; i < count ; i ++ ) { list . add ( value ) ; } return list ; }
fullfill an array list with a pattern .
