- add
Inserts the specified element into this queue if it is possible to do so
immediately without violati
- poll
Retrieves and removes the head of this queue, or returns null if this queue is
empty.
- isEmpty
- size
- remove
- offer
Inserts the specified element into this queue if it is possible to do so
immediately without violati
- clear
- peek
Retrieves, but does not remove, the head of this queue, or returns null if this
queue is empty.
- addAll
- iterator
- contains
- element
Retrieves, but does not remove, the head of this queue. This method differs from
#peek only in that