Make sure that you have the recommeded version of the Java Development Kit (JDK) installed. Mac OS users click here.
The JavaFX Preview SDK provides two primary downloads:
Individual components of the JavaFX Preview SDK can also be downloaded separately.
Netbeans IDE 6.1 with JavaFX is the quickest and easiest way for you to see JavaFX technology in action. You will have everything you need to explore the samples, learn via tutorials and run your code.
Project Nile is a suite of tools and plugins for Adobe® Photoshop® CS3 and Adobe® Illustrator® CS3 to streamline delivery of visual elements into JavaFX applications, and simplify the workflow between designers and developers.
Advanced users can download the JavaFX Preview SDK without the NetBeans IDE 6.1 and the JavaFX plugin. Release Notes.
If you already have Netbeans IDE 6.1, you can get JavaFX support by following these instructions.