Backport9
A collection of backports and utilities to support libraries and apps that want to use Java 9 features but still function on Java 8.
Modules
A light shim library that wraps Java 9 and previous reflection APIs to allow a uniform API into "module"-like behaviors on all recent JDKs.
Buffers
Binary-compatible calling shims for java.nio.Buffer and subclasses.
Stack
A look-alike wrapper around the Java 9 StackWalker API with Java 8 support.