2015-08-13 23:54:40 +02:00
|
|
|
---
|
|
|
|
|
layout: pattern
|
|
|
|
|
title: Iterator
|
|
|
|
|
folder: iterator
|
2015-08-15 18:03:05 +02:00
|
|
|
permalink: /patterns/iterator/
|
2015-08-20 21:40:07 +02:00
|
|
|
categories: Behavioral
|
|
|
|
|
tags: Java
|
2015-08-13 23:54:40 +02:00
|
|
|
---
|
|
|
|
|
|
|
|
|
|
**Intent:** Provide a way to access the elements of an aggregate object
|
|
|
|
|
sequentially without exposing its underlying representation.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
**Applicability:** Use the Iterator pattern
|
|
|
|
|
|
|
|
|
|
* to access an aggregate object's contents without exposing its internal representation
|
|
|
|
|
* to support multiple traversals of aggregate objects
|
|
|
|
|
* to provide a uniform interface for traversing different aggregate structures
|
|
|
|
|
|
|
|
|
|
**Real world examples:**
|
|
|
|
|
|
2015-08-15 18:03:05 +02:00
|
|
|
* [java.util.Iterator](http://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html)
|
