You receive these errors because you have defined one or more methods in your DataBaseConn service to throw a ClassNotFoundException and a SQLException. Because these service interfaces are in the client package, GWT tries to compile them into javascript. But the GWT compiler only supports java classes listed at http://code.google.com/intl/en-EN/webtoolkit/doc/latest/RefJreEmulation.html
You have to define your own exception, something like "public class DatabaseException extends Throwable" and use this exception instead of ClassNotFoundException and SQLException. So in your server implementation of your DataBaseConn service you have to catch these two exceptions and throw your DatabaseException with a meaningful exception message. Well and just make sure your database jdbc jar is in <war directory>/WEB-INF/lib. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.