Can't import java.awt.* and javax.swing.* in Intellij

Question

The title said it all. I can't import neither java.awt.* nor java.swing.* in Intellij Idea. This is my project structure.

java version "9.0.4"
Java(TM) SE Runtime Environment (build 9.0.4+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)

Answer 1

This is how i done it. It seems that i need to include a module-info.java file

and inside that put the follwoings.

module project.name {
    requires java.datatransfer;
    requires java.desktop;
}

I can't come up with a better answer right now. but this solved the initial problem.