insert an item as the first item of the list . concode_field_sep Node<E> head concode_elem_sep E data concode_elem_sep int size concode_elem_sep Node<E> next concode_field_sep void add concode_elem_sep boolean add concode_elem_sep void addAfter concode_elem_sep E set concode_elem_sep int size concode_elem_sep E removeFirst concode_elem_sep E get concode_elem_sep String toString concode_elem_sep E removeAfter concode_elem_sep Node<E> getNode concode_elem_sep E remove concode_elem_sep boolean remove
void function ( E arg0 ) { head = new Node < E > ( arg0 , head ) ; size ++ ; }