ConcurrentSkipListSet isEmpty() method in Java

// Java Program to demonstrate isEmpty()
// method of ConcurrentSkipListSet() 

import java.util.concurrent.*;

class ConcurrentSkipListSetIsEmptyExample1 {
    public static void main(String[] args)
    {
        // Creating a set object
        ConcurrentSkipListSet<Integer> Lset = 
                   new ConcurrentSkipListSet<Integer>();

        // Adding elements to this set
        for (int i = 10; i <= 50; i += 10)
            Lset.add(i);

        // Checks if this set is empty or not
        if (Lset.isEmpty())
            System.out.println("The set is empty.");
        else
            System.out.println("The set is non-empty.");
    }
}

// Java program to demonstrate isEmpty()
// method of ConcurrentSkipListSet() 

import java.util.concurrent.*;

class ConcurrentSkipListSetIsEmptyExample2 {
    public static void main(String[] args)
    {
        // Creating a set object
        ConcurrentSkipListSet<Integer> Lset = 
                       new ConcurrentSkipListSet<Integer>();

        // Checks if this set is empty or not
        if (Lset.isEmpty())
            System.out.println("The set is empty.");
        else
            System.out.println("The set is non-empty.");
    }
}