The core Vaadin infamously has no support for cross field validation. It is our second most voted feature among pro support users. The reason why it hasn’t been done is that it is really hard to implement perfectly in Vaadin, mostly for the reason that Vaadin contains “UI…

Webjars are a handy way to consume various JS libraries in JVM applications. Maven will handle the dependencies and typically those are really easy serve from your web applications. With Servlet 3 containers you don’t even need a specific servlet for that, but typical Vaadin…

I recently published some great helpers for connecting large amount of data to UI components. They provide you simple tools to make a well performing databinding with Vaadin UI components and a service layer implemented with e.g. Spring Data or a stateless EJB.

During the last year, while working with various Vaadin example apps, I have been continuously adding lots of small enhancements to my helper library, previously called Maddon. There are lots of satisfied Vaadin developers who have already adopted…

Vaadin and some other Java frameworks tend to have some rather “verbose” interfaces. For example Container and its sub interfaces has lots of methods that you actually don’t need to implement, except with a dummy implementation that…