LinkedList spliterator() Method in Java (original) (raw)

Last Updated : 10 Jan, 2025

In Java, the **spliterator() method of the LinkedList class returns a Spliterator that helps iterate over an element of the linked list. A Spliterator is a special type of iterator used to process elements in parallel processing of elements when used with conjunction in parallel streams.

**Example 1: The below Java program demonstrates **the basic traversal of a LinkedList using the spliterator() method.

Java `

// Java Program to demonstrate // spliterator() method of LinkedList import java.util.*;

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

    // Create a LinkedList
    LinkedList<String> l = new LinkedList<>();

    l.add("Geeks");
    l.add("For");
    l.add("Geeks");

    // Get the Spliterator for the LinkedList
    Spliterator<String> it = l.spliterator();

    // Use the Spliterator to
    // traverse the LinkedList
    System.out.println("Splitting the list:");
    it.forEachRemaining(System.out::println);
}

}

Output

Splitting the list: Geeks For Geeks

Syntax of LinkedList spliterator() Method

public Spliterator spliterator()

**Return Type: This method returns a Spliterator of type E, which can be used to traverse or split the elements of the linked list.

The spliterator interface has two main methods which are listed below:

**1. trySplit()

It splits the elements into two groups one group returned a new spliterator while the original spliterator keep the other group.

**Syntax of trySplit():

public Spliterator trySplit()

**Return Type: A new Spliterator covering some portion of the elements, or null if splitting is not possible.

**2. tryAdvance()

It processes the next element if present and advances the Spliterator

**Syntax of tryAdvance():

public boolean tryAdvance(Consumer<? super T> action)

**Parameter: A functional interface that defines the action to perform on the current element.
**Return Type: Returns true if there was an element to process, otherwise false.

**Example 2: The below Java program demonstrate how **to use the trySplit() to divide a spliterator into two parts and process each part separately.

Java `

// Java Program to demonstrate the use of trySplit() import java.util.*;

public class Geeks {

public static void main(String[] args) {

    // Create a list
    List<String> l = Arrays.asList("A", "B", "C", "D", "E");

    // Get the Spliterator
    Spliterator<String> s = l.spliterator();

    // Split the Spliterator
    Spliterator<String> n = s.trySplit();

    // Process the first part
    if (n != null) {
        System.out.println("First Spliterator:");
        n.forEachRemaining(System.out::println);
    }

    // Process the second part
    System.out.println("Second Spliterator:");
    s.forEachRemaining(System.out::println);
}

}

Output

First Spliterator: A B Second Spliterator: C D E

**Example 3: The below Java Program demonstrate the spliterator() method on a LinkedList of type String which contains a list of Movie Names.

Java `

// Java Program Demonstrate spliterator() // which contains list of movie name import java.util.*;

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

    // create a list of Movie 
    // names of string values
    LinkedList<String> l = new LinkedList<String>();

    // Add Strings to list
    // each string represents city name
    l.add("Delhi 6");
    l.add("3 Idiots");
    l.add("Stree");
    l.add("Airlift");

    // using spliterator() method
    Spliterator<String> s = l.spliterator();

    // print result from Spliterator
    System.out.println("List of Movies:");

    // forEachRemaining method of Spliterator
    s.forEachRemaining(
        (n) -> System.out.println("Movie Name: " + n));
}

}

Output

List of Movies: Movie Name: Delhi 6 Movie Name: 3 Idiots Movie Name: Stree Movie Name: Airlift