I'm experimenting with Akka and I have setup the simple HelloWorld program mentioned in the documentation.

Since the program does not have an explicit main method defined, I need to invoke the program from the command line using:

```
java -classpath <all those JARs> akka.Main com.example.HelloWorld

```

My question is how do I do this from *within* Intellij? Probably very simple but I'm relatively new to Intellij.