# Looping different class instances

**URL:** <https://discourse.processing.org/t/looping-different-class-instances/5843>\
**Category:** Coding Questions\
**Created:** [November 23, 2018, 3:51am UTC](https://discourse.processing.org/t/looping-different-class-instances/5843 "2018-11-23T03:51:00Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![GoToLoop](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/gotoloop/32/86_2.png) [@GoToLoop](https://discourse.processing.org/u/GoToLoop)\
**Post date:** [November 24, 2018, 10:26pm UTC](https://discourse.processing.org/t/looping-different-class-instances/5843/10 "2018-11-24T22:26:30Z")

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> [@Aleksi](#):
>
> Does one provide advantages over another?

Java allows a subclass to `extends` 1 parent class only. ☕  
But a class (or even an interface) can `implements` as many interfaces as we want. 🤩

1. [extends / Reference / Processing.org](http://Processing.org/reference/extends.html)
2. [implements / Reference / Processing.org](http://Processing.org/reference/implements.html)

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