This tutorial introduces the difference between classes and interfaces, then guides you through examples demonstrating how to declare, implement, and extend Java interfaces.

For example, InetAddress (in the java.net package), which represents an Internet Protocol address, declares a private Addresses interface that’s implemented by private CachedAddresses and ...

So to learn Java lambda syntax, you need to be familiar with its three component parts: The argument list The arrow The method body To apply these concepts, we first need a functional interface. A ...