CopyOnWriteArraySet isEmpty() method in Java
The isEmpty(E e) method of CopyOnWriteArraySet checks if the Set is empty or not. It returns true if the Set is empty, else it returns false.
Syntax:
public boolean isEmpty()
Return Value: The function returns true if the Set is empty, otherwise it returns false.
Below programs illustrate the above function:
Program 1:
Java
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
CopyOnWriteArraySet<Integer> ArrSet
= new CopyOnWriteArraySet<Integer>();
ArrSet.add( 32 );
ArrSet.add( 67 );
ArrSet.add( 98 );
ArrSet.add( 100 );
System.out.println( "CopyOnWriteArraySet: " + ArrSet);
if (ArrSet.isEmpty())
System.out.println( "\nSet is empty" );
else
System.out.println( "\nSet is not empty" );
}
}
|
Output:
CopyOnWriteArraySet: [32, 67, 98, 100]
Set is not empty
Program 2:
Java
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
CopyOnWriteArraySet<String> ArrSet
= new CopyOnWriteArraySet<String>();
System.out.println( "CopyOnWriteArraySet: "
+ ArrSet);
if (ArrSet.isEmpty())
System.out.println( "\nSet is empty" );
else
System.out.println( "\nSet is not empty" );
}
}
|
Output:
CopyOnWriteArraySet: []
Set is empty
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArraySet.html#isEmpty–
Last Updated :
25 Nov, 2020
Like Article
Save Article
Share your thoughts in the comments
Please Login to comment...