Intellij idea JDK does not understand or see him? But the code compiles fine.
Here Intellij highlights almost everything that is supposedly speaking do not understand or know.


and he auto tip say the rules, all we see, but as soon as I finish entering, will again become red.

if you look at the options fix the problem all boils down to this

but the JDK is already was originally, it appeared after a reboot
