Just a heads-up that jdk9-b74 has a refresh of the jimage and jrt file system implementation.
For IDEs and other tools that are using the jrt file system then an important change in this build is the addition of the /packages and /modules top-level directories in the file system. Details in JDK-8066492 [1].
-Alan. [1] https://bugs.openjdk.java.net/browse/JDK-8066492
