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. These additions make interfaces more ...

See the Java 101 Java interfaces tutorial for a more in-depth introduction to using interfaces in your Java programs, including where and where not to use default, static, and private methods.

The functional Consumer interface is used extensively across the Java API, with a number of classes in the java.util.function package, such as ObjIntConsumer, BIConsumer and IntConsumer providing ...