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HashSet Hashset implements the Set interface, which is in the hashtable and it an HashMap instance gets created. It doesn't gurantee the iteration order as well as consistency of the order over the period of time. It allows the null element to be used and passed to methods. HashSet provides constant time performance for the basic operations (add, remove, contains and size), assuming the hash function distributes the elements properly among the buckets. public class HashSet<element> extends AbstractSet<element> Rohit Sharma 07-29-2014 02:08 AM

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