The goal of this chapter of the tutorial is to install (or check that you already have
installed) a minimally needed set of software to build a Cayenne application.
Obviously, JDK has to be installed. Cayenne 4.0 requires JDK 1.7 or newer.
Download and install IntelliJ IDEA Community Edition.
This tutorial is based on version 2016.3, still it should work with any recent IntelliJ IDEA version.