Shulou(Shulou.com)06/01 Report--

This article introduces the knowledge of "how to use the Function of Java8". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Java8 adds a new feature, Function, which, as the name implies, must be a functional operation. We know that the biggest feature of Java8 is the functional interface. All interfaces marked with @ FunctionalInterface annotations are functional interfaces, specifically, all interfaces marked with this annotation will be available for lambda expressions.

There are many interfaces labeled @ FunctionalInterface, but this article focuses on Function, and it's easy to understand other operations of Function.

@ FunctionalInterfacepublic interface Function {R apply (T t); / * * @ return a composed function that first applies the {@ code before} * function and then applies this function * / default Function compose (Function

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