CopyOnWriteArraySet isEmpty() method in Java
Last Updated :
25 Nov, 2020
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–
Like Article
Suggest improvement
Share your thoughts in the comments
Please Login to comment...