Community driven content discussing all aspects of software development from DevOps to design patterns. Quite often a Java Stream or other component needs an object passed to it in order to perform ...

Rewrite object-oriented code using functional techniques. Get started with lambdas, method references, functional interfaces, and the Streams API in Java Welcome back to this two-part tutorial ...

There are only half a dozen classes you really need to master to become competent in the world of functional programming. The java.util.function package contains well over 40 different components, but ...

You want Bar to be passed a function to call, but not use it on construction, only on the callbacks from the GUI widget. That function must end up being an actual method somewhere (it's Java, ...