Stuck at “Hello World” with IntelliJ IDEA 9.0.1 for Scala?

From your screenshot it looks like you were using: class hello { def main(a: ArrayString) = println("got args: " + a) } The main method has to be on an object to support a main method Capitalizing the object / class name is the convention but it isn't enforced.

From your screenshot it looks like you were using: class hello { def main(a: ArrayString) = println("got args: " + a) } The main method has to be on an object to support a main method. Capitalizing the object / class name is the convention but it isn't enforced.

This was the closest answer... Changing to object and removing the "=" fixes the immediate problem (I can get past that configuration dialog now, although the program fails to actually run). You may want to edit your answer to reflect that. Thanks – Alex R Apr 20 '10 at 0:57 I just tried a test project, as above, and had very similar issues.

I've created 50+ little scala projects with the only issue being changing the compiler and library jars defaults (from the plugin) to those from the scala distro of choice. However I am seeing the same problem creating a run config, I can compile but the run config dialog fails to find the the workaround is not to use the chooser and type "" in the Main class field. There is still a warning about "Main method not found in class " but the run config will work.

Contact support, they are very responsive. – Don Mackenzie Apr 20 '10 at 9:47.

It may be a bug in the plugin. If you define you object as (capitalized) then it works, at least on my machine.

I tried that, but it doesn't solve the problem. – Alex R Apr 19 '10 at 13:19.

Is your file called hello. Scala? (I can't see that it has the .

Scala extension in your screenshot) - it must be a . Scala file as otherwise the compiler will not be able to compile it.

IntelliJ hides the extension. Windows Explorer shows . Scala – Alex R Apr 19 '10 at 13:17.

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