Web Reference: The name deque is short for "double ended queue" and is usually pronounced "deck". Most Deque implementations place no fixed limits on the number of elements they may contain, but this interface supports capacity-restricted deques as well as those with no fixed size limit. 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. In this tutorial, we will learn about the Deque interface, how to use it, and its methods.
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