JRE 8u71 is already installed on the system.
Installed JRE 9 ea b103. Run the Java verify applet
www.java.com/verify

Dialog appears with message "Your Java version is out of date"
(See attached screenshot)
with three options -
Later Block Update

Now, if you click on Update -> Bring you to Download Java for MAC OS X
Recommended Version 8 Update 71

If you click on Later -> confirms that you have recommended java version 9 ea.
Congratulations!
You have the recommended Java installed (9-ea).
(See attached screenshot)