ArrayDeque
ArrayDeque is a resizable-array implementation of the Deque interface in Java, providing a double-ended queue that supports efficient insertion and removal at both ends. It is part of the Java Collections Framework and offers better performance than LinkedList for most deque operations due to its array-based structure, with constant-time amortized operations for adding and removing elements.
Developers should use ArrayDeque when they need a high-performance, general-purpose deque for scenarios like implementing stacks, queues, or sliding window algorithms, as it avoids the overhead of node-based structures like LinkedList. It is particularly useful in applications requiring frequent add/remove operations at both ends, such as in breadth-first search algorithms or task scheduling systems, where its O(1) amortized time complexity provides efficiency gains.