In 7u6 and highest build Java SE JavaFX is integrated in JDK and JRE. But we can'nt use JavaFX classes by default as java classes because jfxrt.jar not loaded. For load jfxrt.jar we must add jfxrt.jar in classpath every time when run application.
We are saying that JavaFX integrated but not load Java FX Runtime libraries by default.

Next issue NetBeans + JavaFX. If install JDK 7u7 and NetBeans 7.2 you cann't create JavaFX application at once, because JavaFX Default Platform not available for NetBeans.
For normal use JavaFX in NetBeans 7.2 with JDK 7u7 we must install JavaFX SDK separately and add jfxrt.jar as library to the NetBeans project.