Find more information here: http://15.droidcon.de/session/lets-get-functional Ever tried functional languages ? Ever been annoyed that every time you get see the same Fibonacci examples or yet another maths problem ? So what can functional languages really teach us on our day to day life as Java devs ? This talk will take some concrete examples and show you how some functional approaches will make your life easier. We will see how we can try and bring functional and immutability to our "beloved" Android Java 7 and what this brings us. We'll be exploring libraries such as RxJava, Auto-Value, Retrolambda and such and see how they can help us shape a more functional Java.