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 theelements within that set.
- C The hashCode method for a given class can be used to test for object inequality， but NOT object equality， 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.