Editor does not contain a main type

Question

Just going through the sample Scala code on Scala website, but encountered an annoying error when trying to run it.

Here\'s the code: http://www.scala-lang.org/node/

Answer 1

I had this problem with a Java project that I imported from the file system (under Eclipse Helios). Here's a hint: the src code didn't seem to be compiled at all, as no "bin" directory showed up.

I had to create a Java project from scratch (using the wizard), then compare the .project files of the non-working and working projects.

The project giving "Editor does not contain a main type" had this as the "buildSpec" in the .project file:

But the working project had this as the "buildSpec":

    
        org.eclipse.jdt.core.javabuilder
        
        
    

I copied this in, and the imported project worked.

I know my answer is for Java, but the same might be the issue for your Scala project.