This server requires an execution environment of JavaSE-1.8, but no valid JRE was found. Caution is advised

Question

I use Eclipse 4.9 twice. one with jdk8 and one with openJDK11. With both I want to integrate Wildfly 14 Runtime via "Window -> Preferences -> Server -> Runtime Environment". The following error occurs when I select "OpenJDK-11.0.2" under Alternate JRE:

This server requires an execution environment of JavaSE-1.8, but no valid JRE was found. Caution is advised.

Thank you in advance for your views and possibly detailed solutions :)

Answer 1

sorry for my bad English. To resolve it, go to

Window -> Preference -> Java -> Compiler

And change the value of Compiler compliance level to 1.8 It work for me.