Java Development Kit 9 out recently. So, it's about time to get some info about what's interesting and new in JDK9.
Collections Framework Enhancements in JDK 9 by Stuart Marks. JDK 9 introduces new collections APIs that make it simple and convenient to create instances of lists, sets, and maps.
Introducing JShell in JDK 9 by Robert Field. An in-depth introduction and demonstration of the new JShell tool that makes investigating, learning, and prototyping easy with JDK 9.
Modules in JDK 9 by Alex Buckley. JDK 9 introduces modules to the Java language that enable programs to be structured more easily and reliably