Java JDK 10
Java 10 was released for general availability a week ago. I just installed it on macOS from http://jdk.java.net/10/ I un-tar'ed the distribution, set JAVA_HOME to the Home directory in the distribution and put Home/bin first on my PATH. I used Java 10 with the latest version of IntelliJ with no problems: opened an existing Java project and switched the JDK to the newly installed JDK 10.
There are several nice features but the only ones I am likely to use are:
Local variable type inference
Better Docker container awareness in Linux
Improved repl support
I have mixed feelings about the rapid new 6 month release cycles, but I understand the desire to compete with other JVM languages like Kotlin, Scala, Clojure, etc.
I have updating both of my Java books (Power Java and Practical Artificial Intelligence Programming With Java) on my schedule for the next 18 months. Java 11 is slated for release September 2018 and I will probably use Java 11 (whatever it will be!) for the updated books sine Java 11 will be a long term support release.