Unable to run Java code with Intellij IDEA

Question

I have just downloaded the IDE, and I want to edit my first Java file with it, I\'m not interested in creating a whole project, just editing the single file.

So I op

Answer 1

Sometimes, patience is key.

I had the same problem with a java project with big node_modules / .m2 directories.
The indexing was very long so I paused it and it prevented me from using Run Configurations.

So I waited for the indexing to finish and only then I was able to run my main class.