# 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.