Book Image

Programming Kotlin

Book Image

Programming Kotlin

Overview of this book

Quickly learn the fundamentals of the Kotlin language and see it in action on the web. Easy to follow and covering the full set of programming features, this book will get you fluent in Kotlin for Android.
Table of Contents (20 chapters)
Programming Kotlin
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Why use properties?


Properties are nothing more than syntactic sugar that allows your source code to call a method using a simplified syntax. Kotlin comes with support for simple properties and delegated properties  (we will see later in the chapter what they are).

How many times have you written a class containing state information, a state that can be either retrieved or changed? Usually, state information comes in the form of fields. Here is a typical class defining two fields:

    class Student { 
      private val name:String; 
      private val age:Int; 
    } 

Writing such a class in Java is quite repetitive (luckily IntelliJ is quite powerful when it comes to code generation and refactoring). You normally provide two methods for each field: a getter and a setter. The code will look similar to this:

    public class Student { 
      private String name; 
      private intage; 
      public Student(String name, intage){ 
        this.name= name...