Book Image

Kotlin Blueprints

By : Ashish Belagali, Akshay Chordiya, Hardik Trivedi
Book Image

Kotlin Blueprints

By: Ashish Belagali, Akshay Chordiya, Hardik Trivedi

Overview of this book

Kotlin is a powerful language that has applications in a wide variety of fields. It is a concise, safe, interoperable, and tool-friendly language. The Android team has also announced first-class support for Kotlin, which is an added boost to the language. Kotlin’s growth is fueled through carefully designed business and technology benefits. The collection of projects demonstrates the versatility of the language and enables you to build standalone applications on your own. You’ll build comprehensive applications using the various features of Kotlin. Scale, performance, and high availability lie at the heart of the projects, and the lessons learned throughout this book. You’ll learn how to build a social media aggregator app that will help you efficiently track various feeds, develop a geospatial webservice with Kotlin and Spring Boot, build responsive web applications with Kotlin, build a REST API for a news feed reader, and build a server-side chat application with Kotlin. It also covers the various libraries and frameworks used in the projects. Through the course of building applications, you’ll not only get to grips with the various features of Kotlin, but you’ll also discover how to design and prototype professional-grade applications.
Table of Contents (16 chapters)
Title Page
About the Authors
About the Reviewer
Customer Feedback

Let's code!

Our project is ready with the required project structure, Gradle dependency, and configuration. It's time to write the application code. 

Application class

The Application class is the starting point, and there must be at least one class that extends the App class. It specifies the initial View that contains the display logic and layout of nodes that are managed as singleton:

     * Starting point of the application
    class DictionaryApp : App(MainView::class, Styles::class)

We need to specify the primary View to the App class as the first constructor parameter. The second Styles parameter is optional and contains the Stylesheet method.

Type-safe CSS

TornadoFX provides type-safe CSS, which enables autocompletion, and checks at compilation time to conveniently create styles in its own class or provide inline styling. It's recommended to provide a Stylesheet method if you want to reuse and organize your styles. Take a look at the following code snippet:

    class Styles...