JDK 9 Developer Preview is now available on java.net
*JDK 9 Developer Preview is now available on java.net 
Developer Preview milestone: - A reasonably stable build suitable for
broad testing by the developer community is available.
JDK 9 Builds 163 and higher include all planned features.
*Attention annotation processing users and authors - * Request for
feedback on annotation processing API changes made in JDK 9.
As has been done previously during Java SE 7 and Java SE 8, the JSR 269
annotation processing API is undergoing a maintenance review (MR) as
part of Java SE 9. Details of the changes in JDK 9 Early Access build
163 & build 164 available here 
Please report experiences running processors under JDK 9 and feedback on
the API changes to the compiler-dev mailing list.
(If you haven’t already subscribed to that list then please do so first,
otherwise your message will be discarded as spam.)