Find common elements - Java Program

Common_Elements.java

import java.util.*;
class Common_Elements
{
        public static void main(String[] args)
        {
                String str1[] = {"One", "Two", "Three", "Four", "Five", "Six"};
                String str2[] = {"Two", "Four", "Six", "Eight", "Ten"};
                //Using iterator methods to find common elements
                System.out.println("Using iterator methods to find common elements");
                HashSet<String> hs = new HashSet<String>();
                for (int i=0; i< str1.length; i++)
                {
                        for (int j=0; j< str2.length; j++)
                        {
                                if (str1[i].equals(str2[j]))
                                {
                                        hs.add(str1[i]);
                                }
                        }
                }
                System.out.println(hs);
                System.out.println("**=====================**=====================**");
                System.out.println("Using retailAll() method to find common elements.");
                HashSet<String> set1 = new HashSet<>(Arrays.asList(str1));
                HashSet<String> set2 = new HashSet<>(Arrays.asList(str2));
                set1.retainAll(set2);
                System.out.println(set1);
                System.out.println("**=====================**=====================**");
        }
}