ConcurrentSkipListSet size() method in Java

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

import java.util.concurrent.ConcurrentSkipListSet;

class ConcurrentSkipListSetSizeExample1 {
    public static void main(String[] args)
    {
        // Initializing the set
        ConcurrentSkipListSet<Integer> set = 
                       new ConcurrentSkipListSet<Integer>();

        // Adding elements to this set
        for (int i = 1; i <= 10; i++)
            set.add(i);

        // Printing the size of the set
        System.out.println("Number of elements in the set = "
                           + set.size());
        // Printing the elements
        System.out.println("set : " + set);
    }
}

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

import java.util.concurrent.ConcurrentSkipListSet;

class ConcurrentSkipListSetSizeExample2 {
    public static void main(String[] args)
    {
        // Initializing the set
        ConcurrentSkipListSet<String> set = 
                         new ConcurrentSkipListSet<String>();

        // Adding elements to this set
        set.add("A");
        set.add("B");
        set.add("C");
        set.add("D");
        set.add("E");

        // Printing the size of the set
        System.out.println("Number of elements in the set = "
                           + set.size());
        // Printing the elements
        System.out.println("set : " + set);
    }
}