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I declare array like that private double[] array = new double[length]. Is it safe to update this array items in one thread and read in another thread? Will I have up to date value?
Note i do not enumerate array. I only access its items by index.
Volatile does not guarantee freshness of a value. It prevents some optimizations, but does not guarantee thread synchronization.
Double is not guaranted to be updated atomically. So updating/reading arrays of doubles without synchronization will not be thread safe at all wit or without volatile as you may read partially written values.