---
layout: pattern
title: Twin
folder: twin
permalink: /patterns/twin/
pumlid: 7SR13OCm30NGLUW0n7UsCS42eyH4zdUpFbNVwNtKQij3qjjo0ICs8kTPJiMLUuPuVGnYAFNff2qdWvrk_l9wIEXfws10t88wno-4gKQ2-az9xsLaRoy0
categories: Creational
tags:
 - Java
 - Difficulty-Intermediate
---

## Intent
 Twin pattern is a design pattern which provides a standard solution to simulate multiple
inheritance in java

![alt text](./etc/twin.png "Twin")

## Applicability
Use the Twin idiom when

* to simulate multiple inheritance in a language that does not support this feature.
* to avoid certain problems of multiple inheritance such as name clashes.

## Credits

* [Twin – A Design Pattern for Modeling Multiple Inheritance](http://www.ssw.uni-linz.ac.at/Research/Papers/Moe99/Paper.pdf)
