CopyOnWriteArraySet
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synchronizedSet()
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It is thread safe because every update operation will
perform on separate cloned copy.
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It is Thread safe beacause at a time only one thread can perform Operation.
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While one thread iterating Set , the other Threads are
allowed to modify and we wont get ConcurrentModificationException.
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While one thread iterating Set , the other Threads are not allowed to
modify Set and we will get ConcurrentModificationException.
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Iterator is Fail-Safe.
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Iterator is Fail-Fast.
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Iterator can performance only read operation and cannot
perform remove operation otherwise we will get runtime exception saying
UnsupportedOperationException.
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Iterator can perform both read and remove operation.
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Introduced in 1.5 version.
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Introduced in 1.7 version.
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13 Feb 2018
Collection
