COPPER 5.0 has just been released and is ready for Java 11 and is available on GitHub and in Maven Central.
COPPER has been updated to ASM 6.1 so that Java 9, 10 and 11 are now supported in addition to Java 8. This version no longer supports Java 7 or older versions.
With COPPER 5.0 the Java Platform Module System is supported so you can create modular applications. However, if you do not need this function, you can use COPPER in the same way as before.
For more information, visit https://copper-engine.org/blog/2018-08-28-/copper-5.0-released.