On: Java 9 is scheduled to launch in July

[adimitrov]

Project Valhalla:

http://openjdk.java.net/projects/valhalla/

No, it's not in 9. It may not even be in 10. Its current status is "Draft"

In the meantime, may I suggest alleviating the pain by using the great immutables library: https://immutables.github.io/immutable.html or Google's autoValue: https://github.com/google/auto/tree/master/value