Java – LinkedList ListIterator example

In this example we will see how to iterate a LinkedList using ListIterator. Using Listterator we can iterate the list in both the directions(forward and backward). Along with traversing, we can also modify the list during iteration, and obtain the iterator’s current position in the list. Read more about it at ListIterator javadoc.

Example

Here we have a LinkedList of Strings and we are traversing it in both the directions using LitIterator.

import java.util.LinkedList;
import java.util.ListIterator;
public class ListIteratorExample {
 
 public static void main(String[] args) {
 
    // Create a LinkedList
    LinkedList<String> linkedlist = new LinkedList<String>();
 
    // Add elements to LinkedList
    linkedlist.add("Delhi");
    linkedlist.add("Agra");
    linkedlist.add("Mysore");
    linkedlist.add("Chennai");
    linkedlist.add("Pune");
 
    // Obtaining ListIterator
    ListIterator listIt = linkedlist.listIterator();
 
    // Iterating the list in forward direction
    System.out.println("Forward iteration:");
    while(listIt.hasNext()){
       System.out.println(listIt.next());
    }

    // Iterating the list in backward direction
    System.out.println("\nBackward iteration:");
    while(listIt.hasPrevious()){
       System.out.println(listIt.previous());
    } 
 }
}

Output:

Forward iteration:
Delhi
Agra
Mysore
Chennai
Pune

Backward iteration:
Pune
Chennai
Mysore
Agra
Delhi