ConcurrentSkipListSet isEmpty() method in Java

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.

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// 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.");
    }
}

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Output:

The set is non-empty.

Program 2: In this program the ConcurrentSkipListSet is empty.

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// 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.");
    }
}

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Output:

The set is empty.

Reference : https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#add(E)



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