The following code is valid in Java
volatile AtomicInteger a = new AtomicInteger(123);
Do we require volatile keyword on Atomic variables such as AtomicInteger? Or is volatile superfluous?
Volatile keyword on Atomic Variable
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2 Answers
It's superfluous for most sane use cases, but conceivably applicable to some weird cases -- not that I can think of any. When in doubt, use final.
volatile is superfluous because the variable inside the AtomicInteger already is volatile and will provide the happens-before relation that is required. Just make the field final.
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