Scala is supported on all the three major Java IDEs: Eclipse-based (including all the different versions of Eclipse, Typesafe's own bundled version known as Scala IDE as well as more commercial IDEs such as SpringSourceSTS), IntelliJ IDEA, and NetBeans. This means that you can just keep working as you used to with Java, for instance, running Scala JUnit tests inside the IDE, directly debugging or remote debugging. The extended Scala support on all of these platforms will provide you with the very useful autocompletion feature and instant feedback on the various types that are inferred by the compiler. In Chapter 2, Code Integration, we used NetBeans mostly because it had a convenient, small, and ready-to-use database and embedded tools to reverse engineer this database into a RESTful API in Java. As the usage of Eclipse targets a larger audience and is also the reference IDE that Typesafe provides support to, we are going to use...