//import java.util.HashSet; // importing the HashSet collections from java.util package import java.util.*; // importing everything from the java.util collections package System.out.println(H1); // ...

Here I am writing a way to implement Hashset. HashSet creates hashtable to store the data. As it implements Set interface so it doesnt contains duplicate elements. It also extends AbstractSet class.

A HashSet is a collection class in Java that implements the Set interface. It stores unique elements and does not allow duplicates. Internally, it uses a hash table to store the elements, which ...