[ 源代码： backport9 ]
软件包：libbackport9-java（1.10-2）
Collection of backports and utilities for apps and libraries
backport9 is 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 is 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 is a binary-compatible calling shims for java.nio.Buffer and subclasses.
Stack is a look-alike wrapper around the Java 9 StackWalker API with Java 8 support.