ConcurrentSkipListSetLastExample

import java.util.concurrent.ConcurrentSkipListSet;
  
class ConcurrentSkipListSetLastExample1 {
    
    public static void main(String[] args)
    {
  
        // Initializing the set using ConcurrentSkipListSet()
        ConcurrentSkipListSet<Integer>
            set = new ConcurrentSkipListSet<Integer>();
  
        // Adding elements to this set
        // using add() method
        set.add(78);
        set.add(64);
        set.add(12);
        set.add(45);
        set.add(8);
  
        // Printing the ConcurrentSkipListSet
        System.out.println("ConcurrentSkipListSet: "
                           + set);
  
        // Printing the highest element of the set
        // using last() method
        System.out.println("The highest element of the set: "
                           + set.last());
  
        // Retrieving and removing first element of the set
        System.out.println("The first element of the set: "
                           + set.pollFirst());
  
        // Checks if 9 is present in the set
        // using contains() method
        if (set.contains(9))
            System.out.println("9 is present in the set.");
        else
            System.out.println("9 is not present in the set.");
  
        // Printing the size of the set
        // using size() method
        System.out.println("Number of elements in the set = "
                           + set.size());
    }
}