I've created Google App Engine project in Java using Eclipse following the book Beginning Java Google App Engine
Before I bought this book I had created projects with unchecked option 'Use Google Web Toolkit' but for this project I checked it (following the book)
Eclipse generated several files for me and I run my applications, copy link to Web Browser (http://localhost:8888) and it gives me an error:
GWT module name_of_my_project may need to be (re)complied
I work on Ubuntu 10.04 (I was testing my application using Firefox and Chromium) and I was trying run my application on Windows XP (using the same Web Browsers) with the same effect (just one difference - Google Chrome made me install Web Toolkit...so I did it but it still gives the same error)
Thanks in advance :)
Thanks for your comments and suggestions. I re-installed Eclipse on Ubuntu and I installed plugin one more time and it works :)
So, be careful which version of Eclipse you use - Eclipse 3.4 has problem with GWT.