Groovy - WARNING: An illegal reflective access operation has occurred

Question

I am pretty much new to java and groovy. I have installed groovy 3.0 on my windows 10 laptop (64 bit) and when tried to run groovy getting following warning:

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Answer 1

Use the Java 8, however, if the java version must be 9 or >, you need to update the groovy version too.

I was running groovy 2.2.1 and it only works until java version 8