Common mistakes made with Functional Java
Brian Vermeer is a Software Engineer at Blue4IT working consultancy based on all sorts of Java projects for the Top-100 companies in the Netherlands. He is passionate about Java, (Pure) Functional Programming and Cybersecurity. Brian is a Developer Champion and a regular conference speaker on events like JFall, JBCNConf, Oracle Code, Devoxx, JavaZone, JFokus and JavaOne. Besides an engineer he is a Reservist at the Royal Netherlands Air Force and a Taekwondo Master.
In Java 8 functional style programming was introduced in Java. Java 9, 10 and 11 extended this with some nice new features. For many people it is hard to grasp the idea of functional style programming after so many years of purely working in the imperative OOP style. The opportunities Java gives us out of the box are massive on the other hand with great power comes great responsibility. Let me point out common mistakes that are made when integrating functional style programming in your every day Java project and how to prevent this. This way you can make better, cleaner and more readable code. But even more important, you will be able to utilize the functional code constructions in Java to it’s full potential ….. and maybe, you even start to like it.