List listIterator() Method in Java with Examples

Last Updated : 02 Jan, 2019

This method returns a list iterator over the elements in the mentioned list (in proper sequence), starting at the specified position in the list. Syntax:

ListIterator listIterator(int index)

Parameters: This method has only argument, i.e, index - index of the first element to be returned from the list iterator (by a call to next). Returns: This method returns a list iterator over the elements in this list (in proper sequence), starting at the specified position in the list. Exception: This method throws an exception IndexOutOfBoundsException - if the index is out of range (index size()) Below programs show the implementation of this method. Program 1:

Java

// Java program to demonstrate
// listIterator() method
// for List interface
import java.util.*;

public class GFG1 {
    public static void main(String[] argv) throws Exception
    {
        try {

            // Creating object of List<Integer>
            List<Integer> arrlist = new ArrayList<>();

            // adding element to arrlist
            arrlist.add(1);
            arrlist.add(3);
            arrlist.add(6);
            arrlist.add(9);

            // print arrlist
            System.out.println("ArrayList: "
                               + arrlist);

            // Creating object of ListIterator<String>
            // using listIterator() method
            ListIterator<Integer>
                iterator = arrlist.listIterator();

            // Printing the iterated value
            System.out.println("\nUsing ListIterator:\n");
            while (iterator.hasNext()) {
                System.out.println("Value is : "
                                   + iterator.next());
            }
        }

        catch (NullPointerException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

ArrayList: [1, 3, 6, 9]

Using ListIterator:

Value is : 1
Value is : 3
Value is : 6
Value is : 9

Program 2: Below is the code to show implementation of list.subList() using Linkedlist.

Java

// Java program to demonstrate
// listIterator() method
// for List interface
import java.util.*;

public class GFG1 {
    public static void main(String[] argv) throws Exception
    {
        try {

            // Creating object of List<Integer>
            List<String> arrlist = new ArrayList<String>();

            // adding element to arrlist
            arrlist.add("A");
            arrlist.add("B");
            arrlist.add("C");
            arrlist.add("D");

            // print arrlist
            System.out.println("ArrayList: "
                               + arrlist);

            // Creating object of ListIterator<String>
            // using listIterator() method
            ListIterator<String>
                iterator = arrlist.listIterator();

            // Printing the iterated value
            System.out.println("\nUsing ListIterator:\n");
            while (iterator.hasNext()) {
                System.out.println("Value is : "
                                   + iterator.next());
            }
        }

        catch (NullPointerException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

ArrayList: [A, B, C, D]

Using ListIterator:

Value is : A
Value is : B
Value is : C
Value is : D

Reference: Oracle Docs

List listIterator() Method in Java with Examples

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List listIterator() Method in Java with Examples

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