What is this syntax - public static 9000?
===

Reading the article on http://www.jamesward.com/2011/08/23/war-less-java-web-apps on how to embed an app server with your application, i noticed this bit of code. 

    package foo;
     
    import java.io.File;
    import java.net.URL;
    import java.util.jar.Attributes;
    import java.util.jar.JarFile;
     
    import org.eclipse.jetty.server.Server;
    import org.eclipse.jetty.server.handler.*;
    import org.eclipse.jetty.util.StringUtil;
    import org.eclipse.jetty.webapp.WebAppContext;
     
    public class Main
    {
     
      public static 9900;">);
        out.close();
      }
    }

What is the Main class doing as i dont understand that syntax.