Download a Eclipse ,version is Eclipse Java EE IDE for Web Developers.And install the vaadin,but when I new a vaadin project,there is a red exclamation mark with my vaadin project and all class can not find vaadin-6.7.3.jar path.
Is your vaadin.jar in WEB-INF/lib directory? Can you see it in Eclipse? If it’s there but you can’t see it, right-click the project and select “Refresh”.
Sounds pretty weird though. This shouldn’t be necessary…
Thank you very much.Now I replace the use of Eclipse 3.6 and there is no problems.