Is JavaFX Supported on OpenJDK?

Can JavaFX Run on OpenJDK? Exploring Support and Distribution

JavaFX provides a modern UI framework for Java applications, and its integration into the Oracle JRE makes it a popular choice for developers. However, some users rely on OpenJDK, particularly on Linux systems. This question explores the current support for JavaFX on OpenJDK and uncovers Linux distributions that offer pre-built OpenJFX packages to simplify application deployment.

JavaFX Support in OpenJDK

Is JavaFX support still weak in OpenJDK?

Historically, OpenJDK lacked robust JavaFX support. However, JavaFX has evolved to become an open-source project integrated into OpenJDK. As a result, JavaFX is accessible on any modern JDK, regardless of its source.

Are there Linux distributions that offer OpenJFX packages?

What Linux distributions provide pre-built OpenJFX packages to ease application deployment?

Yes, there are Linux distributions that offer pre-built OpenJFX packages, eliminating the need for users to manually build and install the library. One notable distribution that offers this is Debian. Developers can install OpenJFX using the following command:

sudo apt-get install openjfx

Note: This package is currently only available for Java 8.

Differences between Oracle JDK and OpenJDK with respect to JavaFX

The Oracle JDK previously included additional software not included in the OpenJDK, which affected JavaFX functionality. Specifically, the ON2 VP6 video codec and the Oracle WebStart/Browser Embedded application deployment technology were exclusive to Oracle's JDK. This resulted in limitations for OpenJDK in playing VP6 FLV files and deploying applications using older deployment methods.

However, these concerns have largely been addressed as JavaFX has fully transitioned to an open-source project. The Oracle WebStart/Browser Embedded deployment technology is now deprecated, and newer versions of JavaFX do not include VP6 encoding support due to Google's decision to not open source that technology.

Advice on JavaFX Deployment

For the best user experience and compatibility across platforms, it is recommended to use Java's self-contained application deployment mode. This allows developers to bundle a specific Java runtime version with their application. The end result is a standalone executable that installs and launches the application like any native application. This method eliminates potential issues with varying Java versions and capabilities on the end-user's machine.

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