Java7 Application Framework Support
The future of the Swing Application Platform on the Java 7 platform is undefined. http://weblogs.java.net/blog/archive/2009/08/19/saf-and-jdk7
Can I use it now?
source to share
While using SAF is pretty safe (because it has nothing to do with JDK7), take a look following the excellent alternative created by a developer frustrated with SAF's slow progress
source to share
thrown
JSR 296: Swing Wrapper Framework
API to define the basic structure of a typical Swing application, thereby eliminating a lot of code patterns and providing a vastly improved initial developer experience
So it looks like it's finally dropped for JDK 7.
However, this does not mean that you cannot use it or that it is in any way "unsafe" to use it (regardless of what you mean exactly that), nor that the project is dead and will not develop farther.
source to share