The Java Platform Module System was put in place with the release of Java SE 9, leading the way to decouple JavaFX from the JDK and make it available as a separate module, Oracle says.

JavaFX represents a significant shift in the way Sun engages with the Java product market. Rather than focusing solely on the underlying technology, Sun is looking to provide a complete solution ...

It runs alongside Java 11, which is currently available as a release candidate, but will be generally available next week. JavaFX 11 also can run on the OpenJDK version of Java 10.

The devoted community of JavaFX maintainers are keeping pace with the six-month Java release cadence with the release of version 14 of the popular rich client toolkit. It's now available for download, ...

JavaFX was an important part of Sun's strategy for fighting back and restoring Java's client-side relevance, but it was poorly communicated and weakly executed.