> ## Documentation Index
> Fetch the complete documentation index at: https://docs.flexagon.com/llms.txt
> Use this file to discover all available pages before exploring further.

# JDK Options

> There are several JDK options available when installing FlexDeploy. The main requirement is that the version of Java used is version 21 or 17. if your

There are several JDK options available when installing FlexDeploy.  The main requirement is that the version of Java used is version 21 or 17. if your Linux distribution includes a build of OpenJDK 21 or 17, you can use that version.

* [Amazon Corretto](https://aws.amazon.com/corretto/) - Amazon's build of OpenJDK with security updates 

* OpenJDK - [Adoptium - OpenJDK](https://adoptium.net/)

* Oracle JDK - Oracle's build for those who meet their license restrictions - [https://www.oracle.com/java/technologies/downloads/#java21](https://www.oracle.com/java/technologies/downloads/#java21)