is the queue empty ? concode_field_sep QueueElement head concode_elem_sep QueueElement cursor concode_elem_sep int length concode_elem_sep QueueElement prev concode_elem_sep QueueElement tail concode_elem_sep QueueElement next concode_elem_sep Object obj concode_elem_sep Queue queue concode_field_sep void enqueue concode_elem_sep boolean hasMoreElements concode_elem_sep boolean hasMoreElements concode_elem_sep Object dequeue concode_elem_sep Object dequeue concode_elem_sep Enumeration elements concode_elem_sep Enumeration reverseElements concode_elem_sep String toString concode_elem_sep void dump concode_elem_sep Object nextElement concode_elem_sep Object nextElement
boolean function ( ) { return ( tail == null ) ; }