Iterate over ArrayList using Iterator in Java

This example demonstrates how to iterate over ArrayList using Iterator in Java.

Iterate over ArrayList using Iterator in Java

The following example shows how to iterate over an ArrayList using
  • iterator().
  • iterator() and Java 8 forEachRemaining() method.
import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.ListIterator; public class IterateOverArrayListExample { public static void main(String[] args) { List<String> tvShows = new ArrayList<>(); tvShows.add("Breaking Bad"); tvShows.add("Game Of Thrones"); tvShows.add("Friends"); tvShows.add("Prison break"); System.out.println("\n=== Iterate using an iterator() ==="); Iterator<String> tvShowIterator = tvShows.iterator(); while (tvShowIterator.hasNext()) { String tvShow = tvShowIterator.next(); System.out.println(tvShow); } System.out.println("\n=== Iterate using an iterator() and Java 8 forEachRemaining() method ==="); tvShowIterator = tvShows.iterator(); tvShowIterator.forEachRemaining(tvShow -> { System.out.println(tvShow); }); System.out.println("\n=== Iterate using a listIterator() to traverse in both directions ==="); // Here, we start from the end of the list and traverse backwards. ListIterator<String> tvShowListIterator = tvShows.listIterator(tvShows.size()); while (tvShowListIterator.hasPrevious()) { String tvShow = tvShowListIterator.previous(); System.out.println(tvShow); } } }

Output

=== Iterate using an iterator() === Breaking Bad Game Of Thrones Friends Prison break === Iterate using an iterator() and Java 8 forEachRemaining() method === Breaking Bad Game Of Thrones Friends Prison break === Iterate using a listIterator() to traverse in both directions === Prison break Friends Game Of Thrones Breaking Bad

Reference


Java ArrayList Source Code Examples


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