from Java’s perspective, an interface is the introduction (but not an implementation) of a type at the source code level. To understand that concept, you first must grasp the notion of type ...

You’ll learn how to use each of these elements in your Java annotations. Using @interface to declare annotation types You can declare an annotation type by specifying the @ symbol immediately ...

unary types and suppliers, knowledge of the rest of the API simply falls into place. In this functional programming tutorial, we will work through a Java Supplier interface example. Java’s functional ...

the object type isn’t required on the left hand side, and if the lambda expression is one line long, both the brackets and the return keyword can be omitted. So a more concise lambda expression that ...