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Showing content from https://www.geeksforgeeks.org/java/copyonwritearrayset-spliterator-method-in-java/ below:

CopyOnWriteArraySet spliterator() method in Java

Last Updated : 11 Jul, 2025

The

spliterator()

method of

CopyOnWriteArraySet

returns an spliterator over the elements in this Set in proper sequence. There is no need of synchronization while operating on the spliterator.

Syntax:

public Spliterator spliterator()

Return Value:

The function returns

an spliterator

over the elements in the Set. Below programs illustrate the above function:

Program 1: Java


 // Java Program to illustrate the CopyOnWriteArraySet
// spliterator() method in Java

import java.util.concurrent.CopyOnWriteArraySet;
import java.util.*;

public class GFG {
    public static void main(String[] args)
    {

        // create object of CopyOnWriteArraySet
        CopyOnWriteArraySet<Integer> ArrSet
            = new CopyOnWriteArraySet<Integer>();

        // Add elements
        ArrSet.add(32);
        ArrSet.add(67);
        ArrSet.add(67);
        ArrSet.add(100);

        // print CopyOnWriteArraySet
        System.out.println("CopyOnWriteArraySet: "
                           + ArrSet);

        Spliterator<Integer>
            numbers = ArrSet.spliterator();

        // print result from Spliterator
        System.out.println("Set of Numbers:");

        // forEachRemaining method  of Spliterator
        numbers
            .forEachRemaining(
                (n) -> System.out.println(n));
    }
}

Output:

CopyOnWriteArraySet: [32, 67, 100]
Set of Numbers:
32
67
100

Program 2: Java


 // Java Program to illustrate the CopyOnWriteArraySet
// spliterator() method in Java

import java.util.concurrent.CopyOnWriteArraySet;
import java.util.*;

public class GFG {
    public static void main(String[] args)
    {

        // create object of CopyOnWriteArraySet
        CopyOnWriteArraySet<String> ArrSet
            = new CopyOnWriteArraySet<String>();

        // Add elements
        ArrSet.add("gopal");
        ArrSet.add("gfg");
        ArrSet.add("jgec");
        ArrSet.add("sudo");

        // print CopyOnWriteArraySet
        System.out.println("CopyOnWriteArraySet: "
                           + ArrSet);

        Spliterator<String>
            numbers = ArrSet.spliterator();

        // print result from Spliterator
        System.out.println("Set of strings:");

        // forEachRemaining method  of Spliterator
        numbers
            .forEachRemaining(
                (n) -> System.out.println(n));
    }
}

Output:

CopyOnWriteArraySet: [gopal, gfg, jgec, sudo]
Set of strings:
gopal
gfg
jgec
sudo

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArraySet.html#spliterator--

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