Groovy JDK 11 disable the WARNING message

Question

When I run Groovy 2.5.3 on JDK 11 its giving warning message:

groovy -e \'print \"h         


        

Answer 1

You can disable the Java warnings with GROOVY_TURN_OFF_JAVA_WARNINGS as a temporary fix:

$ GROOVY_TURN_OFF_JAVA_WARNINGS=true groovy -e 'print "hi\n"'
hi

Answer 2

The current stable version 3.0.x of Groovy is reported to fix this issue, see GROOVY-8339 for the detailed discussion.

Answer 3

This is still an issue in Groovy 2.5.8

I'm on macOS. I chose to fall back to Java 8 (In homebrew, do a brew cask install adoptopenjdk8) and the warnings went away. I understand that is is not desirable if you need a newer JDK (I do not)