Download any of 64 windows build from http://jre.us.oracle.com/java/re/jdk/9/promoted/ea/bXX/bundles/windows-x64/ and try command
javapackager -version at command line.
OUTPUT: 8.0
Expected OUTPUT: 9.0
javapackager -version at command line.
OUTPUT: 8.0
Expected OUTPUT: 9.0