Difference between for each loop and iterator?

    // Using for  each we don't have a chance to remove object from the list.
   // Using iterator we have  a chance to remove  object from the list while iterating  using iterator object.

package collectctiondemo;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

public class ArrayListDemo {

           

            public static void main(String[] args) {

                        List<String> l=new ArrayList<>();

                        l.add("govind");

                        l.add("ballabh");

                        l.add("khan");

                        l.add("java");

                         l.add("technology");

                System.out.println("------------List Data----------");

                System.out.println(l);

             // Using for  each we don't have a chance to remove object from the list.

                System.out.println("-------------Using For each loop----------");

                for(String s1:l)

                {

                        System.out.println(s1); 

                        //l.remove("ballabh");//java.util.ConcurrentModificationException

                }

               

                System.out.println("-------------Using iterator ----------");

             // Using iterator we have  a chance to remove  object from the list while iterating  using iterator object.

               

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

               while (it.hasNext()) {

                        String s1 =  it.next();

                        System.out.println(s1);

                        //l.remove(s1);//java.util.ConcurrentModificationException

                        if(s1.equals("ballabh"))

                                    it.remove();

            }

               System.out.println("----------------After remove operation------------");

               System.out.println(l);

               

               

             

                       

            }

}

o/p:----------------------------------

------------List Data----------

[govind, ballabh, khan, java, technology]

-------------Using For each loop----------

govind

ballabh

khan

java

technology

-------------Using iterator ----------

govind

ballabh

khan

java

technology

----------------After remove operation------------

[govind, khan, java, technology]