In this Java 101 tutorial, I’ve explained how interfaces differ from classes, and showed you how to declare, implement, and extend interfaces in your Java programs.

Maximizing code reuse in your Java programs means writing code that is easy to read, understand, and maintain. Here are eight ways to get started. ... Interface Segregation Principle ...

There are only a few key intefaces you need to master in order to become a competent functional programmer. If you understand the concepts laid out in this functional Consumer interface example, ...

So a more concise lambda expression that implements this Java Function interface would look like this: Function<Integer, String> conciseLambda = (Integer x)-> { return Integer.toString(x*x); }; System ...