22 lines
661 B
Markdown
22 lines
661 B
Markdown
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---
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layout: pattern
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title: Iterator
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folder: iterator
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categories: pattern_cat
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tags: pattern_tag
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---
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**Intent:** Provide a way to access the elements of an aggregate object
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sequentially without exposing its underlying representation.
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**Applicability:** Use the Iterator pattern
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* to access an aggregate object's contents without exposing its internal representation
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* to support multiple traversals of aggregate objects
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* to provide a uniform interface for traversing different aggregate structures
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**Real world examples:**
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* [java.util.Iterator](http://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html)
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