Usage of API documented as @since1.6+

Question

I keep getting this error even though I have a 1.6+ version (I have 1.8), and i'm working with IntelliJ.

P.S. I have tried to update both, java jre and java jdk, didn't help!

Answer 1

File > Project Structure > Project Settings > Modules > your Module name > Sources > Language Level > choose the one which you need.