October 2021
Intermediate to advanced
500 pages
16h 23m
English
Content preview from Kotlin Programming: The Big Nerd Ranch Guide, 2nd Edition
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17 Interfaces and Abstract Classes
In this chapter you will see how to define and use interfaces and abstract classes in Kotlin.
An interface allows you to specify common properties and behavior that are supported by a subset of classes in your program – without being required to specify how they will be implemented. This capability – the what without the how – is useful when inheritance is not the right relationship for classes in a program. Using an interface, a group of classes can have properties or functions in common without sharing a superclass or subclassing one another.
You will also work with a type of class called an abstract class, a hybrid between the features of interfaces and classes. Abstract classes are similar ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.