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Hands-On Object-Oriented Programming with Kotlin

You're reading from   Hands-On Object-Oriented Programming with Kotlin Build robust software with reusable code using OOP principles and design patterns in Kotlin

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Product type Paperback
Published in Oct 2018
Publisher Packt
ISBN-13 9781789617726
Length 370 pages
Edition 1st Edition
Languages
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Authors (2):
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Abid Khan Abid Khan
Author Profile Icon Abid Khan
Abid Khan
Igor Kucherenko Igor Kucherenko
Author Profile Icon Igor Kucherenko
Igor Kucherenko
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Toc

Table of Contents (14) Chapters Close

Preface 1. Getting Started with Kotlin 2. Introduction to Object-Oriented Programming FREE CHAPTER 3. The Four Pillars of Object-Oriented Programming 4. Classes - Advanced Concepts 5. Data Collection, Iterators, and Filters 6. Object-Oriented Patterns in Kotlin 7. Coroutines - a Lightweight Thread? 8. Interoperability 9. Regular Expression and Serialization in Kotlin 10. Exception Handling 11. Testing in Object-Oriented Programming with Kotlin 12. Assessments 13. Other Books You May Enjoy

Polymorphism

In object-oriented programming, polymorphism is a concept where a function behaves differently, depending on the type of object that calls it. To understand the concept of polymorphism, we will continue with the Shape class example. Every shape has its own type and dimensions, but all shapes can be drawn on the screen. When the Circle class calls the draw function, it calculates the area and draws it. Similarly, if the Triangle class calls the draw function, it calculates the base and height and draws it. The same applies to the other classes. The idea behind polymorphism is that the draw function can display different shapes and the program can determine which shape of the function to call at the time of execution. There are different types of polymorphism used in Kotlin. In this section, we are discussing inheritance-based polymorphism. The idea behind this is that...

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