implement, and extend Java interfaces. You’ll also learn how the interface has evolved in Java 8, with the addition of default and static methods, and in Java 9 with the new private methods.

Abstract classes and interfaces in Java serve fundamentally different ... because interfaces can’t have state. A default method can have an implementation, whereas abstract methods can’t.

If you want to master functional programming, the best place to start is with the Java Function interface. This example will show you four different ways to implement this functional interface in your ...