# Uses of Class
java.util.AbstractQueue

Packages that use AbstractQueue
Package
Description
java.util
Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
java.util.concurrent
Utility classes commonly useful in concurrent programming.

## Uses of AbstractQueue in java.util

Subclasses of AbstractQueue in java.util
Modifier and Type
Class
Description
`class`
`PriorityQueue<E>`
An unbounded priority queue based on a priority heap.

## Uses of AbstractQueue in java.util.concurrent

Subclasses of AbstractQueue in java.util.concurrent
Modifier and Type
Class
Description
`class`
`ArrayBlockingQueue<E>`
A bounded blocking queue backed by an array.
`class`
`ConcurrentLinkedQueue<E>`
An unbounded thread-safe queue based on linked nodes.
`class`
`DelayQueue<E extends Delayed>`
An unbounded blocking queue of `Delayed` elements, in which an element can only be taken when its delay has expired.
`class`
`LinkedBlockingDeque<E>`
An optionally-bounded blocking deque based on linked nodes.
`class`
`LinkedBlockingQueue<E>`
An optionally-bounded blocking queue based on linked nodes.
`class`
`LinkedTransferQueue<E>`
An unbounded `TransferQueue` based on linked nodes.
`class`
`PriorityBlockingQueue<E>`
An unbounded blocking queue that uses the same ordering rules as class `PriorityQueue` and supplies blocking retrieval operations.
`class`
`SynchronousQueue<E>`
A blocking queue in which each insert operation must wait for a corresponding remove operation by another thread, and vice versa.