How to Traverse ArrayList using Iterator in Java

In this Java core tutorial we learn how to traverse through an java.util.ArrayList using java.util.Iterator interface in Java programming language.

How to traverse through an ArrayList using Iterator in Java

In Java, with a given ArrayList object we can use the List.iterator() method to return an Iterator object which can be used to traverse over all elements of the ArrayList as the following example Java code.

ArrayListIteratorExample1.java

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

public class ArrayListIteratorExample1 {
    public static void main(String... args) {
        List<String> list = new ArrayList<>();
        list.add("Java");
        list.add("Kotlin");
        list.add("Groovy");

        // Iterate over elements of an ArrayList
        Iterator<String> iterator = list.iterator();
        while(iterator.hasNext()) {
            String item = iterator.next();
            System.out.println(item);
        }
    }
}