IntelliJ System.out.println() - Cannot resolve method println(java.lang.String)

Question

I am using IntelliJ IDEA, learning Java. All went well until yesterday, when the mentioned error occurred.

I didn't make any changes. I was looking for the solution the following ways:

1. reboot the pc
2. restart IntelliJ.
3. delete the project directory and use another one (both on desktop)

nothing helps. buy running simple hello world method. It keeps showing this error:

Is there someone able to help me?

Answer 1

ok, is solved.

file -> invalidated caches / Restart

Answer 2

I think if you have tried the method above, maybe you can consider where you use System.out.println() because this method should only used in main(String args[]){},the latest version of the Idea is OK. I wish what said can help you.

Answer 3

One reason for this to happen is if you have print statement somewhere on the body of the class, and not inside a method.

Here is an example:

But if the print is inside a method, it should work fine.

Here is an example: