How to declare array elements volatile in Java?

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Use AtomicIntegerArray or AtomicLongArray or AtomicReferenceArray

The AtomicIntegerArray class implements an int array whose individual fields can be accessed with volatile semantics, via the class’s get() and set() methods. Calling arr.set(x, y) from one thread will then guarantee that another thread calling arr.get(x) will read the value y (until another value is read to position x).

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