After studying Set, HashSet and TreeSet individually, let us summarize their differences. Now let us go with Set and HashSet. These two are very much related as HashSet is a class derived from Set interface. As a derived class of Set, the HashSet attains the properties of Set. Important and the most frequently used derived …
Two programs are given on HashSet with different functionality. HashSet General: In this program, the general methods like contains, equals, add, size, remove, toArray and hashCode usage is illustrated. Elements are printed with foreach loop. HashSet Operations: In this program, Iterator for printing the elements of HashSet is used. The methods like addAll(), clear(), retainAll(), …
HashSet Example addAll containAll retainAll Iterator Read More »
Two programs are given on HashSet Tutorial with different functionality. HashSet General: In this program, the general methods like contains(), equals(), add(), size(), remove(), toArray() and hashCode() usage is illustrated. Elements are printed with foreach loop. HashSet Operations: Iterator for printing the elements of HashSet is used. Methods like addAll, clear, retainAll, containsAll and toString …
HashSet Tutorial add remove equals contains hashCode Read More »
HashSet Tutorial: HashSet implements the Set interface. HashSet uses hash table, at the background, for storage of elements; uses a mechanism called hashing. No guarantee of returning the elements in the same order when called different times or insertion order. HashSet permits null element. But the set should contain only one null value as duplicates …
