Web Reference: Learn about the Deque interface, a linear collection that supports element insertion and removal at both ends. See the methods, inheritance, and implementation of the Deque interface and its subclasses. Mar 24, 2026 · The Deque interface is part of the java.util package and extends the Queue interface. It stands for Double-Ended Queue and represents a linear collection that allows insertion, removal, and retrieval of elements from both ends. Apr 1, 2025 · Learn what deque or double-ended queue is in Java, how it differs from queue and stack, and how to use it with ArrayDeque and LinkedList classes. See the API methods, examples and FAQs of deque in Java.
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