Continuously getting the java: invalid source release: 1.9 error when compiling

Question

I have attempted to fix this problem using the various forums on this site, but nothing has helped. I tried similar techniques as used to fix other people's 1.8 errors, but nothing has worked. I have my java class file under my source folder and no imports, I just simply want a basic output message to make sure intelliJ is working as it should. Can anyone offer any advice?

Answer 1

Here change the language level to 1.8 or lesser. This changes the target release version.

Go to file -> settings -> Build Execution and Deployment -> Java -> Compiler

Here change the language level to 1.8 or lesser. This changes the source release version.

File -> Project Structure -> Module Settings -> Tab: Source: Language Level

and also here,

File -> Project Structure -> Project(In left pane) -> Project language level