IntelliJ IDEA can't setup JDK

Question

I\'m trying to setup JDK in IntelliJ IDEA and whatever I do, or whatever JDK version I select, nothing happens. The following situation remains:

Answer 1

In my case just File | Invalidate Caches and Restart did not work. Upon Right clicking the project and going to Module Settings , I had no SDK selected under Project Settings->Project.