Explain CopyOnWriteArraySet in Java collection.

CopyOnWriteArraySet is a Set implementation backed up by a copy-on-write array. All mutative operations, such as add, set, and remove, are implemented by making a new copy of the array; no locking is ever required.

CopyOnWriteArraySet is best suited as read-only collection whose size is small enough to copy .CopyOnWriteArraySet is backed by CopyOnWriteArrayList.

CopyOnWriteArraySet iterators do not support the mutative remove operation.

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