T function ( ) { return head . value ; }
gets the next item in the queue without removing it . concode_field_sep Node<T> head concode_elem_sep long delay concode_elem_sep int size concode_elem_sep Node<T> next concode_elem_sep T value concode_field_sep void add concode_elem_sep T pop concode_elem_sep long delay concode_elem_sep int size concode_elem_sep boolean isEmpty concode_elem_sep boolean isNotEmpty concode_elem_sep String toString concode_elem_sep long tick concode_elem_sep boolean remove