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)
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