Java 9 is now obsolete; Java 10 is the current version. See http://blog.joda.org/, scroll down to article "Monday, 5 February 2018, Java 9 has six weeks to live"
Announcement email: http://mail.openjdk.java.net/pipermail/announce/2018-March/000247.html Long Term Support versions of Java are 8, 11, ...; maybe we should be sufficiently happy to "sync" with those (every 1 1/2 years). -Marshall
