Appendix: Compatibility with earlier versions and migration

JENV V9.0A is an implementation of the “Java Platform, Standard Edition” (Java SE^TM) for BS2000.

With OpenJDK 9, a module concept was introduced in Java. Due to this module concept, neither source nor binary compatibility with the previous versions can be guaranteed. A detailed migration guide is available at the following link https://docs.oracle.com/javase/9/migrate/toc.htm.