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Java 9 with JShell

You're reading from Java 9 with JShell Introducing the full range of Java 9's new features via JShell

Product type Paperback

Published in Mar 2017

Publisher Packt

ISBN-13 9781787282841

Length 408 pages

Edition 1st Edition

Languages

Java

Concepts

Object Oriented Programming

Author (1):

Gaston C. Hillar

View More author details

Table of Contents (16) Chapters

Preface

1. JShell – A Read-Evaluate-Print-Loop for Java 9 FREE CHAPTER

2. Real-World Objects to UML Diagrams and Java 9 via JShell

3. Classes and Instances

4. Encapsulation of Data

5. Mutable and Immutable Classes

6. Inheritance, Abstraction, Extension, and Specialization

7. Members Inheritance and Polymorphism

8. Contract Programming with Interfaces

9. Advanced Contract Programming with Interfaces

10. Maximization of Code Reuse with Generics

11. Advanced Generics

12. Object-Oriented, Functional Programming, and Lambda Expressions

13. Modularity in Java 9

A. Exercise Answers

Index

Chapter 9. Advanced Contract Programming with Interfaces

In this chapter, we will dive deeper into contract programming with interfaces. We will have a better understanding of how interfaces work as types. We will:

Work with methods receiving interfaces as arguments
Downcast with interfaces and classes
Understand boxing and unboxing
Treat instances of an interface type as a different subclass
Take advantage of default methods in interfaces in Java 9

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Authors (1)

Gaston C. Hillar

Gaston C. Hillar

Gaston C. Hillar is Italian and has been working with computers since he was 8 years old. Gaston has a Bachelor's degree in computer science (graduated with honors) and an MBA. Currently, Gaston is an independent IT consultant and a freelance author who is always looking for new adventures anywhere in the world. He was a senior contributing editor at Dr. Dobb's, and has written more than a hundred articles on software development topics. He has received the prestigious Intel Black Belt Software Developer award eight times. He has written many articles about Java for Oracle Java Magazine. Gaston was also a former Microsoft MVP in technical computing. He lives with his wife, Vanesa, and his two sons, Kevin and Brandon.

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