ConcurrentSkipListSet spliterator() method in Java

// Java Program Demonstrate Spliterator()
// method of ConcurrentSkipListSet

import java.util.Spliterator;
import java.util.concurrent.ConcurrentSkipListSet;

class ConcurrentSkipListSetSpliteratorExample1 {
    public static void main(String[] args)
    {
        // Initializing the set
        ConcurrentSkipListSet<String> set = 
                    new ConcurrentSkipListSet<String>();

        // Adding elements to this set
        set.add("Gfg");
        set.add("is");
        set.add("best!!");

        // spliterator split and iterate
        // the split parts in parallel
        Spliterator<String> str = set.spliterator();

        // performs the action for each remaining element
        str.forEachRemaining(
            (n) -> {
                String lc = n.toUpperCase();
                System.out.println(" Lower case = " + n);
                System.out.println(" Upper case = " + lc);
                System.out.println();
            });
    }
}

// Java Program Demonstrate Spliterator()
// method of ConcurrentSkipListSet

import java.util.Spliterator;
import java.util.concurrent.ConcurrentSkipListSet;

class ConcurrentSkipListSetSpliteratorExample2 {
    public static void main(String[] args)
    {
        // Initializing the set
        ConcurrentSkipListSet<Character> set = 
                         new ConcurrentSkipListSet<Character>();

        // Adding elements to this set
        for (char ch = 'A'; ch <= 'Z'; ch++) {
            set.add(ch);
        }

        // Printing elements in the set
        System.out.print("The elements in the set are : ");

        // spliterator  split and iterate
        // the split parts in parallel
        Spliterator<Character> str = set.spliterator();

        // if element exists tryAdvance() will perform action
        while (str.tryAdvance((n) -> System.out.print(n + " ")))
            ;
    }
}