Uses of Interface java.util.Deque (Java Platform SE 8 )
Date: 2026-04-17

## Uses of Interface
java.util.Deque

- Packages that use Deque
  Package | Description
  --- | ---
  java.util | Contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array).
  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 and 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 and 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 and 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 and Description
    --- | ---
    `class` | `ConcurrentLinkedDeque<E>` An unbounded concurrent deque based on linked nodes.
    `class` | `LinkedBlockingDeque<E>` An optionally-bounded blocking deque based on linked nodes.

Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2026, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.