Help with a simple iterator question

Question

the question is how to reset an iterator so it points to the beginng of a collection. Here is a piece of code. Thanks in advance:
import java.io.*;
import java.util.*;
public class IteratorTest {
public static void main(String[] args) {
List list = new ArrayList();
for (int i=0; i<10; i++) {
list.add(new Integer(i));
Iterator it = list.iterator();
while (it.hasNext()) {
System.out.println(it.next());
// want to reset iterator here without
// it = list.iterator();
while (it.hasNext()) {
System.out.println(it.next());

Answer 1

Instead of using an Iterator, use a ListIterator.
ListIterator it = list.listIterator();
// walk forwards
while (it.hasNext()) {
  it.next();
// walk backwards
while (it.hasPrevious()) {
  it.previous();
// walk forwards again
while (it.hasNext()) {
  it.next();
}