Object function ( ) { if ( first == null ) { throw new NoSuchElementException ( ) ; } return first . data ; }
returns the first element in the linked list . concode_field_sep Node next concode_elem_sep Node last concode_elem_sep Object data concode_elem_sep Node previous concode_elem_sep Node position concode_elem_sep Node first concode_field_sep void next concode_elem_sep void add concode_elem_sep void addLast concode_elem_sep Iterator iterator concode_elem_sep boolean atEnd concode_elem_sep Object removeFirst concode_elem_sep Object get concode_elem_sep boolean hasNext concode_elem_sep Object getLast concode_elem_sep Object removeLast concode_elem_sep void remove concode_elem_sep void addFirst