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We currently run Java 17.

JDK Installation

Ubuntu

OpenJDK is the recommended JDK to install.

OpenJDK

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Azul Zulu JDK

Manually install Azul's JDK FX (https://cdn.azul.com/zulu/bin/zulu8.54.0.21-ca-fx-jdk8.0.292-linux_x64.tar.gz)

Example

$ curl -sL https://cdn.azul.com/zulu/bin/zulu8.54.0.21-ca-fx-jdk8.0.292-linux_x64.tar.gz -o zulu.tar.gz
$ tar -xvzf zulu.tar.gz
# mv zulu8.54.0.21-ca-fx-jdk8.0.292-linux_x64/ /opt/.
# rm /opt/zulu
# ln -s /opt/zulu8.54.0.21-ca-fx-jdk8.0.292-linux_x64/ /opt/zulu

Jetbrains Runtime

The Jetbrains runtime (customized JDK) is an option for installing on Linux. It provides font rendering fixes. Read more here.

Windows

Azul is providing JDK 8 with JavaFX as part of their community Zulu distribution. You may also reference the official Zulu Installation Guide including the Installation on Windows Using the Zulu ZIP File page.

1. Visit https://www.azul.com/downloads/zulu-community/?architecture=x86-64-bit&package=jdk-fx
2. Under Zulu Community Downloads, select:
   1. Java Version: Java 8 (LTS)
   2. Operating System: Windows
   3. Java Package: JDK FX (if not already selected)
3. Download the zip distribution and extract the contents to a temporary folder
4. Move the extracted folder to something like C:\Program Files\Zulu\zulu8.46.0.19-ca-fx-jdk8.0.252-win_x64
5. In Windows > System Properties > Environment Variables
   
   1. Append the bin directory of the JDK to the PATH variable (i.e PATH=<other_stuff>;C:\Program Files\Zulu\zulu8.46.0.19-ca-fx-jdk8.0.252-win_x64\bin)
   2. Set JAVA_HOME to the JDK directory (i.e JAVA_HOME=;C:\Program Files\Zulu\zulu8.46.0.19-ca-fx-jdk8.0.252-win_x64)
6. (Optional) Open a new console and check that java -version prints something like the following

java -version
openjdk version "1.8.0_252"
OpenJDK Runtime Environment (Zulu 8.46.0.19-CA-win64) (build 1.8.0_252-b14)
OpenJDK 64-Bit Server VM (Zulu 8.46.0.19-CA-win64) (build 25.252-b14, mixed mode)

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Note: JDKs are also available from https://adoptopenjdk.net/, but they won't provide JavaFX, which breaks most of IHMC's robotics software.

Mac OS X

Download JDK and JavaFX from https://adoptopenjdk.net/ or https://www.azul.com/downloads/zulu/zulufx/

Download JavaFX 8 from https://www.azul.com/downloads/zulu-community/zulufx/

Using SDKMAN!

See the page on SDKMAN!.

Before starting, a useful command to remember is "list" which shows all available versions:

sdk list java

Now install JavaFX:

sdk install java 8.0.322.fx-zulu

Note, the JDK will be installed in a hidden folder located at:

~/.sdkman/candidates/java/8.0.332.fx-zulu

Windows

Configuration

Logging

See the IHMC Log Tools README for details on enabling different log levels.

Testing

For testing in IDE, see Unit Testing/wiki/spaces/HOWTO/pages/14288377. For testing with Gradle and on Bamboo, see IHMC CI Gradle plugin and Integrating with Bamboo /wiki/spaces/HOWTO/pages/14288249.

JVM options

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See Java Platform Module System

Learning Resources

• Guide: Learning Java
• The Java™ Tutorials
• Thinking in Java (ISBN 978-0131872486) by Bruce Eckel

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