Using recursion with grep on windows

I've hit this problem before, but never figured it out, so it has bugged me for a while now. But finally, here is the answer.

Having recently started on support for a new project at work, I wanted to get a sense of who had worked on this code base over the past decade or so of its existence. Being a fan of GNU tools for Windows my mind immediately goes to grep, but it didn't work the way I intuitively thought that it should. I wanted to do this from my project directory:

   grep --recursive @author *.java

...and then I figured a quick awk script could roll up counts by name for me. That last argument of *.java however needs be either a list of non-wildcarded filenames or a simple *

  grep --recursive --include="*.java" @author *

Thanks to the poster of this message for helping me find the answer.