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 ...

The map() function in Java’s Stream API expects a Function<? super T, ? extends R>. In the case of a stream of String objects, this becomes Function<String, String>.

Java EE8 will add a functional programming language capability, and marrying functional language programming with cloud parallelism should create new microservice models for enterprise applications.

Enhanced Java Streams with Gatherers (JEP 485) Developers leveraging Java’s Stream API will benefit from JEP 485, Stream Gatherers, which introduces more flexible intermediate operations. Unlike ...