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Java ListIterator :
- Java ListIterator is much the same as an Iterator that is used to iterate elements one-by-one from a List implemented object.
- It is offered since Java 1.2.
- The ListIterator extends Iterator interface.
- It is useful only for List implemented classes.
- Unlike Iterator, It supports all the four operations: CRUD (CREATE, READ, UPDATE and DELETE).
- Unlike Iterator, It also supports both Forward Direction and Backward Direction iterations.
- It is a Bi-directional Iterator.
- It has no current element; its cursor position always lies between the element that will be returned by a call to previous() and the element that will be returned by a call to next().
Syntax:
listIterator(int index)Parameters:
| Name | Description | Type |
|---|---|---|
| index | index of the first element to be returned from the list iterator (by a call to next) | int |
Return Value :
- A list iterator over the elements in this list (in correct sequence), initial at the specified position in the list
Sample Code:
import java.util.*;
public class kaashiv_infotech
{
public static void main(String[] args)
{
ArrayList<String> values = new ArrayList<String>();
values.add("arjun");
values.add("tiger");
values.add("rohny");
values.add("jimy");
values.add("praveen");
ListIterator<String> rol = values.listIterator();
while (rol.hasNext())
System.out.println(rol.next());
System.out.println("");
System.out.println("");
while (rol.hasPrevious())
System.out.println(rol.previous());
}
}Output:
arjun
tiger
rohny
jimy
praveen
praveen
jimy
rohny
tiger
arjun