Check out example codes for "java hashset". It will help you in understanding the concepts better.

Code Example 1

HashSet<String> hset = new HashSet<String>();
// Adding elements to the HashSet
hset.add("Apple");
hset.add("Mango");

Code Example 2

HashSet<Integer> set=new HashSet<>();
//adding a new element
set.add(10);

Code Example 3

Let’s see java hashset example.

import java.util.HashSet;
public class HashSetExample
{
   public static void main(String[] args)
   {
      HashSet<String> hs = new HashSet<>();
      hs.add("Banana");
      hs.add("Orange");
      hs.add("Apple");
      hs.add("Pineapple");
      hs.add("Mango");
      System.out.println(hs);
   }
}

Code Example 4

HashSet<String> h = new HashSet<String>();

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