Page History

...

Some of the changes targeted for JDK 9 may affect code that relies on default, deprecated, removed, unsupported, internal or unspecified functionality. The list below has been compiled from the list of JEPs targeted for JDK 9 and other resources. It is not an exhaustive list of changes - there may be other changes you run into that have not been listed here.

...

When resource usage overhead needs to be minimized a collector other than G1 should be used, and after this change the alternate collector will have to be specified explicitly.

Marlin Graphics Renderer

JEP 265 may affect code using the Java 2D graphics rasterizer. This JEP updatse Java 2D to use the Marlin Renderer as the default graphics rasterizer.

Modular Run-Time Images

JEP 220 may affect code that relies on the removed endorsed-standards override mechanism, the removed extension mechanism, and the existence of rt.jar and tools.jar files as well as the old directory layout of files in the JDK & JRE installation image.

...