You're reading from Learn Java 17 Programming Learn the fundamentals of Java Programming with this updated guide with the latest features

Product type Paperback

Published in Jul 2022

Publisher Packt

ISBN-13 9781803241432

Length 748 pages

Edition 2nd Edition

Languages

Java

Tools

Java design patterns

Concepts

Object Oriented Programming

Author (1):

Nick Samoylov

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Table of Contents (23) Chapters

Preface

1. Part 1: Overview of Java Programming

2. Chapter 1: Getting Started with Java 17 FREE CHAPTER

3. Chapter 2: Java Object-Oriented Programming (OOP)

4. Chapter 3: Java Fundamentals

5. Part 2: Building Blocks of Java

6. Chapter 4: Exception Handling

7. Chapter 5: Strings, Input/Output,and Files

8. Chapter 6: Data Structures, Generics, and Popular Utilities

9. Chapter 7: Java Standard and External Libraries

10. Chapter 8: Multithreading and Concurrent Processing

11. Chapter 9: JVM Structure and Garbage Collection

12. Chapter 10: Managing Data in a Database

13. Chapter 11: Network Programming

14. Chapter 12: Java GUI Programming

15. Part 3: Advanced Java

16. Chapter 13: Functional Programming

17. Chapter 14: Java Standard Streams

18. Chapter 15: Reactive Programming

19. Chapter 16: Java Microbenchmark Harness

20. Chapter 17: Best Practices for Writing High-Quality Code

21. Assessments

22. Other Books You May Enjoy

Polymorphism in action

Polymorphism is the most powerful and useful feature of OOP. It uses all the other OOP concepts and features we have presented so far. It is the highest conceptual point on the way to mastering Java programming. After discussing it, the rest of the book will be mostly about Java language syntax and JVM functionality.

As we stated in the OOP concepts section, polymorphism is the ability of an object to behave as an object of different classes or as an implementation of different interfaces. If you search the word polymorphism on the internet, you will find that it is the condition of occurring in several different forms. Metamorphosis is a change of the form or nature of a thing or person into a completely different one, by natural or supernatural means. So, Java polymorphism is the ability of an object to behave as if going through a metamorphosis and to exhibit completely different behaviors under different conditions.

We will present this concept in...