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Beginner

20h

Updated 3 weeks ago

The Ultimate Guide to Kotlin Programming
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Gain insights into Kotlin, explore differences from Java, work with functions and collections, delve into advanced topics like lambdas and async programming, and build an Android app.

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Kotlin has been growing in popularity among developers for some time. It was given even more recognition when Google announced in 2019 that Kotlin was now their preferred language for Android development. In this comprehensive course, you’ll start by learning the fundamentals, such as: how Java and Kotlin differ, how to work with functions, and how to utilize collections, something you’ll work with extensively in Kotlin. In the latter half of the course, you’ll be introduced to more advanced concepts like lambdas, fluency in Kotlin, and asynchronous programming. In the last section of the course, you’ll take what you’ve learned and build out an Android application that talks to a backend service. By the time you’re done with this course, you’ll have a thorough mastery of this modern JVM language. This course is based on the PragProg book, Programming Kotlin, written by the extraordinary, experienced programming-language enthusiast: Venkat Subramaniam.

Kotlin has been growing in popularity among developers for some time. It was given even more recognition when Google announced i...Show More

Content

156 Lessons34 Quizzes

Getting Started

3 Lessons

Get familiar with Kotlin's versatility, its audience, and comprehensive course offerings.

Introduction

Who's This Course for?

What's in this course?

Hello Kotlin

8 Lessons

Look at Kotlin's versatility, interoperability, and efficiency in modern software development.

Introduction to Kotlin

Reasons to Love Kotlin

Why Should You Choose Kotlin?

Taking Kotlin for a Ride

Compile to Bytecode and Run

Compiling to Other Targets

Which Option to Choose?

Wrapping Up

Kotlin Essentials for the Java Eyes

9 Lessons

Work your way through Kotlin's concise syntax, type inference, string templates, and immutability.

Introduction to Kotlin Essentials

Less Typing

Sensible Warnings

Prefer val over var

Improved Equality Check

String Templates

Raw Strings

More Expressions, Fewer Statements

Wrapping Up

Working with Functions

6 Lessons

Grasp the fundamentals of Kotlin functions, flexibility with arguments, and enhanced code readability.

Introduction to Functions in Kotlin

Creating Functions

Default and Named Arguments

vararg and Spread

Destructuring

Wrapping Up

External Iteration and Argument Matching

5 Lessons

Take a closer look at Kotlin's iteration methods, collections interaction, and `when` expressions for efficient control flow.

Introduction to External Iteration with Argument Matching

Range and Iteration

Iterating over Arrays and Lists

When It’s Time to Use when

Wrapping Up

Using Collections

8 Lessons

Simplify complex topics in Kotlin collections, enhancing safety and functional programming.

Introduction to Collections in Kotlin

Flavors of Collections

Using Pair and Triple

Arrays of Objects and Primitives

Type Safety to Save the Day

8 Lessons

Approach type safety in Kotlin through null checks, smart casting, and generics.

Introduction to Type Safety in Kotlin

Any and Nothing Classes

Nullable References

Type Checking and Casting

Explicit Type Casting

Generics: Variance and Constraints of Parametric Types

Reified Type Parameters

Wrapping Up

Objects and Classes

7 Lessons

Learn how to use Kotlin's streamlined object-oriented features and efficient class creation techniques.

Introduction to Objects and Classes

Objects and Singletons

Creating Classes

Companion Objects and Class Members

Creating Generics Classes

Data Classes

Wrapping Up

Class Hierarchies and Inheritance

7 Lessons

Discover the logic behind Kotlin's intricate class hierarchies, inheritance, and design principles.

Introduction to Class Hierarchies and Inheritance

Creating Interfaces and Abstract Classes

Nested and Inner Classes

Inheritance

Sealed Classes

Creating and Using Enums

Wrapping Up

10.

Extension Through Delegation

9 Lessons

Examine Kotlin's delegation for adaptable design, code reuse, and robust property management.

Introduction to Delegation

When to Choose Delegation over Inheritance?

Designing with Delegates

Delegating to a Parameter

Dealing with Method Collisions

Caveats of Kotlin Delegation

Delegating Variables and Properties

Built-in Standard Delegates

Wrapping Up

11.

Functional Programming with Lambdas

8 Lessons

Find out about Kotlin's functional programming with lambdas, closures, and performance optimization.

Introduction to Lambdas in Kotlin

The Functional Style

Lambda Expressions

Lambdas and Anonymous Functions

Closures and Lexical Scoping

Non-Local and Labeled return

Inlining Functions with Lambdas

Wrapping Up

12.

Internal Iteration and Lazy Evaluation

5 Lessons

Deepen your knowledge of Kotlin's internal iteration, lazy evaluation, and performance optimization.

Introduction to Internal Iteration and Lazy Evaluation

External vs. Internal Iterators

Internal Iterators

Sequences for Lazy Evaluation

Wrapping Up

13.

Fluency in Kotlin

8 Lessons

Focus on writing fluent, expressive Kotlin code using operator overloading, extension functions, infix notation, and versatile object methods.

Introduction to Fluency in Kotlin

Overloading Operators

Injecting Using Extension Functions and Properties

Extending Functions

Function Fluency with infix

Fluency with Any Object

Implicit Receivers

Wrapping Up

14.

Creating Internal DSLs

7 Lessons

Master the steps to design, enhance, and manage internal DSLs in Kotlin efficiently.

Introduction to DSLs in Kotlin

Types and Characteristics of DSLs

Kotlin for Internal DSLs

Challenges in Building for Fluency

Type-Safe Builders

Narrowing Access with Scope Control

Wrapping Up

15.

Programming Recursion and Memoization

6 Lessons

Learn how to use recursion, tail call optimization, and memoization to enhance Kotlin performance.

Introduction to Recursion and Memoization

The Power and Perils of Recursion

Tail Call Optimization

Memoization

Applying Memoization to Dynamic Programming

Wrapping Up

16.

Exploring Coroutines

9 Lessons

Unpack the core of Kotlin's coroutines enhancing concurrency and asynchronous programming efficiency.

Introduction to Coroutines in Kotlin

Coroutines and Concurrency

Running Concurrently Using Coroutines

Coroutine Context and Threads

Debugging Coroutines

async and await

A Peek at Continuations

Creating Infinite Sequences

Wrapping Up

17.

Asynchronous Programming

5 Lessons

Examine asynchronous programming with Kotlin coroutines, focusing on concurrency, exception handling, and task management.

Introduction to Asynchronous Programming in Kotlin

Programming Asynchronously

Exception Handling

Cancellations and Timeouts

Wrapping Up

18.

Intermixing Java and Kotlin

5 Lessons

Grasp the fundamentals of integrating Kotlin with Java through joint compilation and interoperability techniques.

Introduction

Joint Compilation

Calling Java from Kotlin

Calling Kotlin from Java

Wrapping Up

19.

Unit Testing with Kotlin

13 Lessons

Take a closer look at unit testing in Kotlin, from setup to advanced testing, tools, and integration.

Introduction to Unit Testing in Kotlin

The Code Under Test

Getting the Project Files

Starting with a Canary Test

Writing Empirical Tests

Writing Data-Driven Tests

Mocking Out Dependencies

Testing Top-Level Functions

Testing Coroutines and Asynchronous Calls

Integrating with the Service

Viewing the Code Coverage

Taking the App for a Drive

Wrapping Up

20.

Programming Spring Applications with Kotlin

9 Lessons

See how Kotlin and Spring streamline development, reduce code, and enhance maintainability.

Introduction to Spring Applications in Kotlin

Creating a Starter Project

Creating a Controller

Creating an Entity Class

Creating a Repository Interface

Creating a Service

Integrating the Service with Controller

Taking It for a Ride

Wrapping Up

21.

Writing Android Applications with Kotlin

8 Lessons

Build on Kotlin's power to create Android apps, focusing on efficient and expressive development.

Introduction to Android Applications in Kotlin

Creating a Project

Defining Domain Objects

Creating Layouts

Implementing the Activity

Updating the RecyclerView

Seeing the App in Action

Wrapping Up

22.

Appendix

3 Lessons

Learn how to use Kotlin for JavaScript, native platforms, and WebAssembly targets.

Transpiling to JavaScript

Kotlin/Native

Kotlin to WebAssembly

Build a Ktor-Based Backend for a Financial App

Project

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

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