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.

In Java 8, functional interfaces with interface default methods offer a near approximation of this same concept. Interface default methods are a new concept in Java.

Also known as the Java 8 Predicate -- which stems from the JDK version where functional programming was introduced to developers -- this simple interface defines five methods, although only the Java ...