Kotlin Quick Start for Java Developers

Name: Kotlin Quick Start for Java Developers
Rating: 4.4 (93 reviews)

A tutorial for Java developers who want to quickly get up to speed with Kotlin.

Created byDave Ford

Last updated 9/2017

English

English [Auto],

What you'll learn

Key concepts/syntax of the Kotlin language
Kotlin in the context of the IntelliJ IDE
Object-oriented programming with Kotlin
Functional programming with Kotlin
Kotlin standard library (highlights)
Kotlin-Java interop and migration strategies
IntelliJ tips and tricks
Setting up Gradle for Kotlin

Course content

4 sections • 19 lectures • 3h 7m total length

Introduction and Kotlin Big Picture12:11
General overview of Kotlin, without delving into language details.

Create a project + hello world7:27
In this lesson we create a Kotlin project in IntelliJ, build a hello world app and cover some Kotlin basics.

creating projects
basic Kotlin syntax
top-level functions
function args
the main function
vars
vals
type inference
packages
array syntax
Classes and java interop10:36
We create a simple class in Kotlin and compare it to the equivalent class in Java. Along the way we learn how to call Java from Kotlin and Kotlin from Java.

creating and using Kotlin classes
constructors
properties versus instance vars
automatic properties
read-only properties
understanding getters and setters
using Java classes from Kotlin
using Kotlin classes from Java

Setting the Blackjack Project, create Card class12:27
In this lesson, we setup a new Gradle project for the Blackjack app that we will be creating throughout this workshop.

Setting up a gradle project
Adding libraries to the gradle classpath
The test-first development approach
Kotlin-specific extensions to junit
Creating a junit test in Kotlin
Introducing the blackjack app
Creating the Card class
Creating a unit test for the Card class
Using Kotlin test assertions
Cmd D IDE shortcut
Setup git4:23
In this lecture we setup a git repository for our project, so we can keep track of each revision of the blackjack application. If you are not interested in git, you can skip this lecture.
Create suitName getter function11:45
In this lesson we create the suitName getter in Card.

Named parameters
getter functions
single expression getter functions
Format code in IntelliJ
if expressions
when expressions
Cmd / IDE shortcut
Alt Cmd L IDE shortcut
Create Card.valueName7:26
Add name and points getter to Card5:54
Validate Card in the init block11:50
Lambdas and Anonymous Functions17:08
Explore anonymous and lambda functions in Kotlin, learn to assign functions to variables, pass them as parameters, and use type inference to write concise, expressive code.
Add error messages to Card's init block8:14
Add lazy error messages to the Card init with require and lambdas, validating values 1–13 and suits 1–4. Explore anonymous functions and concise lambdas for on-demand error text.
Create the Hand class16:03
Create a Hand class in Kotlin for blackjack, a test-driven wrapper around a mutable list of cards with add, size, and point total methods, plus Kotlin syntax and refactoring.
Improve the Hand.points getter10:23
Render Hand to the console8:02
Demonstrates rendering a hand to the console by printing names, points, and cards with a render hand function, and exposes a read-only card view from a private list.
Create the Deck class11:24
create a deck class representing a 52-card deck with a take function that removes the top card and a size property. render the deck and expose a read-only cards view.
Add shuffle to Deck14:19
Game test12:17
Create Game class4:43
Builds a blackjack game class with a deck and player and dealer hands, performs the initial deal, and implements player hits and dealer auto-hit until 17.

Requirements

A basic knowledge of Java
Our examples are in the form of junit test cases, so a basic understanding of what a unit test is, while not required, might be helpful.

Description

In this course, I will guide you through a number of small examples and one modestly complex project. Through these examples, you'll learn the fundamental language features needed to create Kotlin applications.

This isn't an in-depth reference covering every detail of the language. Rather, it's a tutorial covering the most important parts of the language, the 80% that I use every day. After completing this course, you'll still have more to learn, but you'll have everything you need to start being productive with Kotlin.

The table of contents is not ordered in terms of Kotlin features. Rather, the course is organized by the business features we add to our sample project. We introduce new Kotlin concepts as the need organically arises in the context of building our project.

We'll be using the IntelliJ IDE. So you'll be learning the fundamentals of Kotlin in the context of one of the world's greatest IDEs. And that's important because Kotlin, when teamed with IntelliJ, provides the most productive programming environment I ever used. With that said, this course is still appropriate for those who just want to learn Kotlin but don't plan on using IntelliJ.

Lastly, this course is not specific to any particular problem domain (i.e. android apps, server-side web apps, compile-to-JavaScript apps, or native apps). Instead, we focus on the core concepts common to all domains. As such, most of our examples take the form junit test cases.

Who this course is for:

Java Developers wanting to quickly get up to speed with Kotlin fundamentals

Kotlin Quick Start for Java Developers

What you'll learn

Explore related topics

Course content

Introduction and Kotlin Big Picture1 lecture • 12min

Kotlin Basics2 lectures • 18min

Blackjack Project15 lectures • 2hr 36min

Conclusion1 lecture • 1min

Requirements

Description

Who this course is for: