I hit F5 ~1000 times and restarted eclipse (also with -clean), deleted /bin, but nothing helps. Manually importing DoodleClient does not help. DoodleClient exists and is perfect
In my case, the DoodleClient class had all its lines commented. It is not the way i wrote the class, it was a side effect of solving improperly a SVN conflict. So if you just ran an update on your project, you might perhaps want to check again the contents of your file.