ConcurrentSkipListSet isEmpty() method in Java

Last Updated : 17 Sep, 2018
The java.util.concurrent.ConcurrentSkipListSet.isEmpty() method is an in-built function in Java which is used to check if this set is empty or not. Syntax: 
ConcurrentSkipListSet.isEmpty()
Parameters: The function does not accepts any parameter. Return Value: The function returns a boolean value. It returns true if the ConcurrentSkipListSet is empty and returns false otherwise. Below programs illustrate the ConcurrentSkipListSet.IsEmpty() method: Program 1: In this program the ConcurrentSkipListSet is non-empty. 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.");
    }
}
Output: 
The set is non-empty.
Program 2: In this program the ConcurrentSkipListSet is empty. Java 
// 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.");
    }
}
Output: 
The set is empty.
Reference : https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#add(E)
Comment

Explore