question: 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 currentNode concode_elem_sep Node position concode_elem_sep int indexvar concode_elem_sep Node first concode_elem_sep boolean isAfterNext concode_field_sep Object next concode_elem_sep void add concode_elem_sep void addLast concode_elem_sep void set concode_elem_sep void set concode_elem_sep Object get concode_elem_sep Object removeFirst concode_elem_sep ListIterator listIterator concode_elem_sep boolean hasNext concode_elem_sep Node getNode concode_elem_sep void addFirst concode_elem_sep void remove
target: Object function ( ) { if ( first == null ) { throw new NoSuchElementException ( ) ; } return first . data ; }