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java-design-patterns/double-dispatch/index.md
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Markus fbb12b53ba Work towards #56: Splitting up the README
I did the job and splitted up the readme, hopefully everything was
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2015-08-13 23:54:40 +02:00

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---
layout: pattern
title: Double Dispatch
folder: double-dispatch
categories: pattern_cat
tags: pattern_tag
---
**Intent:** Double Dispatch pattern is a way to create maintainable dynamic
behavior based on receiver and parameter types.
![alt text](./etc/double-dispatch.png "Double Dispatch")
**Applicability:** Use the Double Dispatch pattern when
* the dynamic behavior is not defined only based on receiving object's type but also on the receiving method's parameter type.
**Real world examples:**
* [ObjectOutputStream](https://docs.oracle.com/javase/8/docs/api/java/io/ObjectOutputStream.html)