# Uses of Interface
java.util.Deque

Packages that use Deque
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 Deque in java.util

  Classes in java.util that implement Deque
  Modifier and Type
  Class
  Description
  `class`
  `ArrayDeque<E>`
  Resizable-array implementation of the `Deque` interface.
  `class`
  `LinkedList<E>`
  Doubly-linked list implementation of the `List` and `Deque` interfaces.
  Methods in java.util with parameters of type Deque
  Modifier and Type
  Method
  Description
  `static <T> Queue<T>`
  Collections.`asLifoQueue(Deque<T> deque)`
  Returns a view of a `Deque` as a Last-in-first-out (Lifo) `Queue`.

- ## Uses of Deque in java.util.concurrent

  Subinterfaces of Deque in java.util.concurrent
  Modifier and Type
  Interface
  Description
  `interface`
  `BlockingDeque<E>`
  A `Deque` that additionally supports blocking operations that wait for the deque to become non-empty when retrieving an element, and wait for space to become available in the deque when storing an element.
  Classes in java.util.concurrent that implement Deque
  Modifier and Type
  Class
  Description
  `class`
  `ConcurrentLinkedDeque<E>`
  An unbounded concurrent deque based on linked nodes.
  `class`
  `LinkedBlockingDeque<E>`
  An optionally-bounded blocking deque based on linked nodes.