Java Collections emptyListIterator() Method with Examples

Last Updated : 03 Jan, 2022

The emptyListIterator() method of Java Collections is a method that is used to iterate the List with no elements in Java.

Syntax:

public static <T> ListIterator<T> emptyListIterator()

Parameters: It has no parameters.

Return Type: It will return the list with empty elements.

Exceptions:

NoSuchElementException - This will occur when the given element is not found in the given collection.

Example 1:

Java

// Java program to run the iterator with no elements import java.util.*;  public class GFG {        // main method     public static void main(String[] args)     {         // create an list iterator         ListIterator<String> iterator             = Collections.emptyListIterator();                // get the elements which is empty         System.out.println(iterator.hasNext());     } }

Output

false

Example 2:

Java

// Java program to iterate the elements with a list // of elements. Here we will get an error  // because the list is not empty import java.util.*;  public class GFG {     // main method     public static void main(String[] args)     {         // create an array list         List<Integer> data = new ArrayList<Integer>();                     // add 2 elements into the array list         data.add(100);         data.add(200);                      // iterate the elements         ListIterator<String> iterator             = Collections.emptyListIterator();                   // display                     System.out.println(iterator.next());     } }

Output:

Exception in thread "main" java.util.NoSuchElementException      at java.util.Collections$EmptyIterator.next(Collections.java:4191)      at GFG.main(GFG.java:12)

Example 3:

Java program to display next index and previous index element. We can do it by using the nextIndex() method to display the next index

Syntax:

iterator.nextIndex()

To display the previous index,

Syntax:

iterator.previousIndex()

Java

// Java program to display next index // and previous index element import java.util.*; public class GFG {      // main method     public static void main(String[] args)     {          // create an array list         List<Integer> data = new ArrayList<Integer>();          // add 2 elements into the array list         data.add(100);         data.add(200);          // iterate the elements         ListIterator<String> iterator             = Collections.emptyListIterator();         System.out.println(iterator.nextIndex());          // display previous element         System.out.println(iterator.previousIndex());     } }