The last one in the preceding enumeration is IntelliJ. This IDE is the only one that does not want to be a framework. IntelliJ is an IDE. It also has plugins, but most of the plugins that you will need to download to use in NetBeans or Eclipse are preconfigured. When you want to use some more advanced plugin, it may however be something you have to pay for, which should not be a problem when you are doing professional, paid work, should it? These things are not that expensive. For learning the subjects in this book, you will not need any plugin that is not in the community edition. As in this book, I will develop the samples using IntelliJ and I recommend that you follow me during your learning experience.