Beginning Kotlin

This book introduces the Kotlin programming skills and techniques necessary for building applications. You'll learn how to migrate your Java programming skills to Kotlin, a Java Virtual Machine (JVM) programming language.

The book starts with a quick tour of the Kotlin language and gradually walks you through the language in greater detail over the course of succeeding chapters. You’ll learn Kotlin fundamentals like generics, functional programming, type system, debugging, and unit testing. Additionally, with the book’s freely downloadable online appendices, you’ll discover how to use Kotlin for building Spring Boot applications, data persistence, and microservices.

WHAT YOU WILL LEARN

* Learn the Kotlin language, its functions, types, collections, generics, classes, and more
* Dive into higher-order functions, generics, debugging, and unit testing
* Apply the fundamentals of Kotlin to Spring Boot
* Add Hibernate to your Spring Boot application for persistence and data accessibility
* Take advantage of functional programming available in Kotlin

WHO THIS BOOK IS FOR

Java developers who are new to Kotlin and want to leverage Kotlin, particularly for building Spring Boot apps.

TED HAGOS is the CTO and Data Protection Officer of RenditionDigital International (RDI), a software development company based out of Dublin. Before he joined RDI, he had various software development roles and also spent time as a trainer at IBM Advanced Career Education, Ateneo ITI, and Asia Pacific College. He spent many years in software development dating back to Turbo C, Clipper, dBase IV, and Visual Basic. Eventually, he found Java and spent many years working with it. Nowadays, he’s busy with full-stack JavaScript, Android, and Spring applications.

Part 1: Kotlin

1. Setup

2. Tour of the Kotlin language

3. Functions

4. Types

5. Higher order functions

6. Collections

7. Generics8. Classes

9. Unit Testing

10. Java Interoperability

Part 2: Spring Boot

11. Spring and SpringBoot

12. Setup

13. Getting started with a projecta. Using the project initializr

b. Auto restarting an app

c. Views and backing beans

d. Views and controller functions

e. Services

f. Posting to a controller

g. Dependency Injection

14. Functional Programming

a. Overview

b. Function parameters

c. Lists

d. Filter and flatMap

e. Reduce and Fold

f. Maps

15. Hibernate

a. Adding the dependencies

b. Entities

c. Persisting to a database

16. Reflection

a. Overview

b. Ins