# 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.