Hi

import java.util.*;
import java.util.Iterator;

public class SimpleIterator{

public static void main(String args[]){
System.out.println("Welcome to roseindia.");
ArrayList<String> array = new ArrayList();
array.add("R");
array.add("o");
array.add("s");
array.add("e");
array.add("i");
array.add("n");
array.add("d");
array.add("i");
array.add("a");
Iterator itr = array.iterator();
while(itr.hasNext()) {
Object element = itr.next();
System.out.print(element + " ");

}
ListIterator litr = array.listIterator();
while(litr.hasNext()) {

Object element = litr.next();
litr.set(element + "");

}
System.out.println("Modified contents of al: ");
itr = array.iterator();
while(itr.hasNext()) {

Object element = itr.next();
System.out.print(element + " ");

}
System.out.println();

}
}

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Read for more information.

http://www.roseindia.net/java/example/java/util/