In an earlier post, I pointed you to JavaFX plug-ins that you can use with the NetBeans and Eclipse IDEs (integrated development environments). The NetBeans plug-in is now open source, as announced in the OpenJFX Announcements forum in this post, shown here for your convenience:
JavaFX(TM) Script Plugin for NetBeans(TM) IDE 6.0 is now
open source! The source code is subject to the terms of the
GNU General Public License Version 2 ("GPL") and the Common
Development and Distribution License("CDDL") terms. Request
your module role now via https://javafx.netbeans.org.
Download! Get involved! Contribute! Enjoy!
To get the plug-in (and NetBeans while you're at it), and to get involved in this open source initiative, visit the JavaFX Script Language Support for the Netbeans IDE site at https://javafx.netbeans.org
JavaFX Script: Dynamic Java Scripting for Rich Internet/Client-side Applications
eBook (PDF) download available at the book's Apress site