public final int updateAndGet (T obj, IntUnaryOperator updateFunction)

Atomically updates (with memory effects as specified by VarHandle.compareAndSet) the field of the given object managed by this updater with the results of applying the given function, returning the updated value. The function should be side-effect-free, since it may be re-applied when attempted updates fail due to contention among threads.

obj    An object whose field to get and set
updateFunction    a side-effect-free function

Returns:  the updated value

Since:  1.8