CopyOnWriteArraySet add() method in Java
The add(E e) method of CopyOnWriteArraySet inserts the element passed in the parameter to the end of the Set or at a specified index in the Set. The function returns true on addition of new element to the Set.
Syntax:
public boolean add(E e)
Parameters: The function accepts a single mandatory parameter element which specifies the element to be added in the Set.
Return Value: The function returns true on addition in the Set.
Below programs illustrate the above function:
Program 1:
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( 2 );
ArrSet.add( 3 );
ArrSet.add( 4 );
ArrSet.add( 7 );
System.out.println( "CopyOnWriteArraySet: "
+ ArrSet);
System.out.println( "On adding 4 it returns "
+ ArrSet.add( 4 ));
System.out.println( "Updated CopyOnWriteArraySet: "
+ ArrSet);
}
}
|
Output:
CopyOnWriteArraySet: [2, 3, 4, 7]
On adding 4 it returns false
Updated CopyOnWriteArraySet: [2, 3, 4, 7]
Program 2:
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( 2 );
ArrSet.add( 3 );
ArrSet.add( 3 );
ArrSet.add( 3 );
System.out.println( "CopyOnWriteArraySet: "
+ ArrSet);
System.out.println( "On adding 45 it returns "
+ ArrSet.add( 45 ));
System.out.println( "Updated CopyOnWriteArraySet: "
+ ArrSet);
}
}
|
Output:
CopyOnWriteArraySet: [2, 3]
On adding 45 it returns true
Updated CopyOnWriteArraySet: [2, 3, 45]
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArraySet.html#add-E-
Last Updated :
26 Nov, 2018
Like Article
Save Article
Share your thoughts in the comments
Please Login to comment...