Java 9 with JShell : Introducing the full range of Java 9's new features via JShell
(Reklamlänk)
The release of Java 9 has brought many subtle and not-so-subtle changes to the way in which Java programmers approach their code. The most important ones are definitely the availability of a REPL, known as JShell, which will make experiments and prototyping much more straightforward than the old IDE