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I'm not sure what you're trying to say, and I don't know a better way to put it than "you're doing it wrong." You shouldn't be using Classname.methodname or anything like that. You should be simply...

...huh? What do you expect that to do? You're making it way more complicated than it should be.

Step one is to put the .java file into the proper folders for the packages it's in.
Step two is to...

See what he does in the main method by creating a new TerrainRenderWindow? That's presumably what you would want to do, although you'd want to pass your own arguments in.