Java ArrayList using Iterator

This tutorial uses iterator to compare 2 arraylists and removes duplicate from list1 that are found is list2.

------------------------------CODE-------------------------------------------------------------


import java.util.ArrayList;
import java.util.List;
import java.util.Collection;
import java.util.Iterator;

/// CREATE 2 ARRAYLISTS.
/// POPULATE LISTS WITH STRINGS.
/// CREATE METHOD THAT COMPARES LIST1 AND LIST2 AND REMOVES
/// ANY DUPLICATES IN LIST1 THAT MAY BE FOUND IN LIST 2

class Colls
{
public static void main(String args[])
{
List <String> list1 = new ArrayList<String>();
List <String> list2 = new ArrayList<String>();


//////////////////
//POPULATE LISTS//
//////////////////

list1.add("Cow");
list1.add("Pig");
list1.add("Sheep");
list1.add("Cat");


list2.add("Cow");
list2.add("Wolf");
list2.add("Fox");
list2.add("Hen");

//DISPLAY LIST1 AND LIST2 DATA
System.out.println("LIST 1 DATA : "+list1);
System.out.println("LIST 2 DATA : "+list2);

//////////////////////////////////////////////
//CALL METHOD EDIT LIST TO REMOVE DUPLICATES//
//////////////////////////////////////////////
editList(list1,list2);

System.out.println();

//DISPLAY LIST1 AND LIST2 DATA AFTER DUPLICATES DELETED
System.out.println("LIST 1 DATA : "+list1);
System.out.println("LIST 2 DATA : "+list2);
}


public static void editList(Collection <String> l1, Collection <String> l2)
{
////////////////////////////////////////////////////////////////
// CREATE ITERATOR SO WE CAN LOOP THOUGH ITEM TO ITEM OF LIST1//
////////////////////////////////////////////////////////////////

Iterator <String> it = l1.iterator();

while(it.hasNext())
{
if(l2.contains(it.next()))
it.remove();
}
}
}



-------------------OUTPUT ---------------------------------------------------


LIST 1 DATA : [Cow, Pig, Sheep, Cat]
LIST 2 DATA : [Cow, Wolf, Fox, Hen]

LIST 1 DATA : [Pig, Sheep, Cat]
LIST 2 DATA : [Cow, Wolf, Fox, Hen]