Error:java: invalid source release: 8 in Intellij. What does it mean?

Question

Im trying to compile some code in I\'m using Intellij Ultimate 13.1.4, but I get the following error and I have no idea what it means:

Information:Using java         


        

Answer 1

I add one more path unmentioned in this answer https://stackoverflow.com/a/26009627/4609353

but very important is Edit Configurations