My previous() method for iterator not working

[RozenKristal]

import java.util.*;
public class ArrayListTesting 
{
    public static void main(String []args)
    {
        LinkedList<String> list = new LinkedList<String>();
        list.add("apple");
        list.add("pear");
        list.add("tree");
        Iterator <String> iterate = list.iterator();
        System.out.println(iterate.next());
        System.out.println(iterate.previous());
        System.out.println(iterate.next());
        System.out.println(iterate.hasNext());
    }
}

it keep telling me it an error.

[Taywin]

What is the error? What is the output before an exception is thrown?

You may want ListIterator, not Iterator. Iterator does NOT have previous() method.

[stultuske]

there is no previous method on Iterator.
http://docs.oracle.com/javase/7/docs/api/java/util/Iterator.html