• • By using ListIterator we can move either to the forward direction or to the backward direction, hence ListIterator is bidirectional cursor.
• • By using ListIterator we can perform replacement and addition of new objects in addition to read and remove operations.
• • We can create ListIterator object by using listIterator() method of List interface.

  • public ListIterator listIterator();
  ListIterator li=l.listIterator():
  //where l is any List object.

Methods in ListIterator:

• • ListIterator is the child interface of Iterator, hence all the methods of Iterator by default available in ListIterator.
• • ListIterator defines the following methods: Forward direction:
  

  public booleanhasNext();
  public Object next();
  public intnextIndex();

  Backward direction:

  public booleanhasPrevious();
  public Object previous();
  public intpreviousIndex();

  Additional capability methods:

  public void remove();
  public void set(Object new); // for replacement new object
  public void add(Object new);

let's see a simple program to better understand these concepts easily.

Example:
ListIteratorDemo.java

importjava.util.*;
classListIteratorDemo
{
	public static void main(String args[])
	{
		LinkedList l=new LinkedList();
		l.add("Sidhant");
		l.add("Anubhav");
		l.add("Babushan");
		l.add("Arindam");
		System.out.println(l);
		ListIterator li=l.listIterator();
		while(li.hasNext())
		{
			String s=(String)li.next();
			if(s.equals("Arindam"))
			{
				li.remove();
			}
			else
			if(s.equals("Babushan"))
			{
				li.add("Amlan");
			}
			else
			if(s.equals("Anubhav"))
			{
				li.set("Budhaditya");
			}
		}
		System.out.println(l);
	}
}

Output:

[Sidhant, Anubhav, Babushan, Arindam]
[Sidhant, Budhaditya, Babushan, Amlan]