As we now reach the end of this book, we would like to emphasize some key aspects on the numerous topics and concepts we have approached during this journey with Scala.

The concise and expressive syntax of the Scala language should make your code not only more readable but also more maintainable for yourself and other developers. You don't have to give up any of the libraries of the very large and mature Java ecosystem as all the APIs can be reused directly within Scala. Moreover, you benefit from many additional great Scala-specific libraries. Our recommendation is to take a piece of Java code from a domain you understand well, maybe because you wrote it in the first place one or several times before. Then, try to convert it to Scala code and refactor it to get rid of the boilerplate and to make it in a more functional style.

The Play Framework is not just another web framework; it breaks the conventional approach of long-cycle development following servlet and EJB containers where...