Java provides util package, in which Iterator is class that is used to iterate list element. So that we have to import java.util.Iterator;

Iterator in Java

Returns an iterator over the elements in this list in proper sequence.

The returned iterator is fail-fast.

Specified by: iterator() in List, Overrides: iterator() in AbstractList

import java.util.ArrayList;

import java.util.Iterator;

public class TestArrayListClass {

       public static void main(String[] args) {

            

             //create arrayList

             ArrayList aList = new ArrayList();

            

             //add elements in list

             aList.add(10);

             aList.add("programming");

             aList.add(123);

             aList.add("shifts");

            

             //how to iterate ArrayList

            

             Iterator  itr = aList.iterator();

             while(itr.hasNext())

             {

                 System.out.println(itr.next()); 

             }

       } 

}

Output:

10

programming

123

shifts