A sequenced collection of items ordered as a queue. You can remove items from the head of the queue and add items at either its tail or its head. Queues index the items with whole-number indexes, in the order in which the items would be removed. The current head of the queue has index 1, the item after the head item has index 2, up to the number of items in the queue.
The class Queue subclasses (specializes) The Object Class and inherits (specializes) in addition: