import java.util.List;
import java.util.ListIterator;
import java.util.ArrayList;

public class ArrayListTest
{
public static void main (String args[])
{
List<String> arrayList = new ArrayList<String>();
arrayList.add(“a”);
arrayList.add(“b”);

ListIterator<String> listIterator = arrayList.listIterator();
while (listIterator.hasNext())
{
System.out.println(listIterator.next());
listIterator.previous( );
}
}

}