int function ( ) { return N ; }
return the number of item in list concode_field_sep Node head concode_elem_sep Node next concode_elem_sep Item item concode_elem_sep Node current concode_elem_sep int N concode_field_sep void add concode_elem_sep void add concode_elem_sep Item next concode_elem_sep Iterator<Item> iterator concode_elem_sep Item get concode_elem_sep boolean isEmpty concode_elem_sep boolean hasNext concode_elem_sep boolean remove concode_elem_sep void remove