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Which two statements are true about the hashCode method？（）
A:The hashCode method for a given class can be used to test for object equality and object inequality for that class.
B:The hashCode method is used by the java.util.SortedSet collection class to order the elements within that set.
C:The hashCode method for a given class can be used to test for object inequality， but NOT objecte quality， for that class.
D:The only important characteristic of the values returned by a hashCode method is that the distribution of values must follow a Gaussian distribution.
E:The hashCode method is used by the java.util.HashSet collection class to group the elements within that set into hash buckets for swift retrieval.

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出自：Oracle认证

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