Take a look at: http://code.google.com/intl/de-DE/webtoolkit/doc/latest/RefJreEmulation.html
If your JRE classes are listed then you can use them in GWT client code and it should work. If they are not listed you simple can not use them. GWT compiles from Java to JavaScript and not everything that Java provides makes sense to translate to JavaScript (and sometimes its not possible). If you really need the classes you can try and provide a custom JRE Emulation for GWT. In case of Swing and SWT.. by default you can not use them with GWT and I think there is no working GWT port. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/yFbySZEvUbQJ. 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.