Introduction to Kotlin Training in Finland

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This is an intensive course for developers moving to Kotlin from Java, C# or similar languages. It is designed to be conducted over four days but can be tailored based on the requirements of the delegates. The delivery is workshop based with delegates spending the majority of their time solving problems and creating sample applications.

By the end of the delivery delegates will be able to program using all the features of Kotlin, refactor Kotlin codebases in IntelliJ, perform TDD using KotlinTest and generate mock objects using Mockito. Additionally they will be able to develop microservices via both Spring MVC and WebFlux and create basic Android applications.

Delegates must be confident Java developers, or else have equivalent experience in languages like Groovy and Clojure. Knowledge of Functional Programming concepts is very helpful but not essential. If the chapters on Spring Services and Mobile Development are being covered then delegates should have prior experience with those frameworks.

Program using both the functional and object-oriented features of Kotlin
Unit test and refactor Kotlin code via KotlinTest, Mockito and IntelliJ
Write RESTful services in Kotlin via Spring Boot, MVC and WebFlux
Create responsive mobile applications using Kotlin and Android Studio

Introducing Kotlin on the JVM

Four coding paradigms within Java 9
Limits imposed by backwards compatability
The new consenses in language design
A brief history of the Kotlin language
Comparing Kotlin to Scala and Clojure
Comparing Kotlin to Swift and TypeScript

First Steps with Kotlin

Declarations and type inference
The Kotlin type system and conversions
Packages, access levels and default imports
Nullable types and operators for null safety
Keywords for selection and iteration
Options for declaring basic functions
Overloading, infix functions and ranges

Object Orientation

Decompiling Kotlin classes using ‘javap’
Understanding properties and backing fields
A detailed explanation of primary constructors
Adding extra fields and secondary constructors
Extra features automatically added to data classes
Overriding, abstract classes and interfaces
Using object expressions as event handlers
Object declarations and companion objects

Agile Development

Review of core principles of Agile development
Refactoring Kotlin code within IntelliJ
Performing TDD in Kotlin using KotlinTest
Using Mockito to separate types from dependencies
Options for BDD and Property Based Testing

Generics and Type Parameters

Revision of covariance and contravariance
Common issues with bounded wildcards in Java
How declaration site variance simplifies generics
Support for use-site variance (aka type projection)
Declaring single and multiple constraints on types

Working with Collections Part 1

Introducing the Kotlin collections library
Working with mutable and immutable collections
Support for destructuring types and collections

Functional Programming

Working with function references and code blocks
Declaring functions as parameters and return types
Using higher order functions for internal iteration
Creating your own versions of ‘filter’, ‘map’ etc…
Using higher order functions to prevent duplication
Understanding partial invocation and currying
Choosing between code blocks and local functions
Common misunderstandings regarding enclosure

Working with Collections Part 2

Basic coding using ‘filter’, ‘map’ and ‘forEach’
Testing against a predicate using ‘all’, ‘any’ etc…
Why ‘flatMap’ is such as valuable operation in FP
Distinguishing between ‘fold’, ‘foldRight’ and ‘reduce’
Converting between collection types within FP

Interoperability Between Kotlin and Java

General guidelines for mixed language codebases
Considerations when calling Java libraries from Kotlin
Obtaining and using java.lang.Class objects in Kotlin
Tips and idioms for calling Kotlin libraries from Java code

Creating Spring Microservices in Kotlin

Revision of the Spring Framework and RESTful architecture
Creating Spring Boot projects in Kotlin via the Spring Initializr
Declaring Spring MVC based RESTful services using annotations
Injecting dependencies and configuring exception handling
Creating reactive microservices using Spring WebFlux
Taking advantage of the Kotlin specific routing DSL

Creating Mobile Applications in Kotlin

Revision of the Android platform and Dalvik VM
Installing Android Studio and configuring emulators
Introducing the sample project for tracking expenses
Reverse engineering the sample activities and layouts
Performing dependency injection on Android with Dagger 2
Persisting application state using the Realm database

Introduction to Kotlin Training Course in Finland

Finland is a country located in northern Europe. Helsinki is the capital and largest city of the country. The majority of the people are Finns but there is also a small Lapp population in Lapland, where the country is famous for the Northern Lights. Finland's national languages are Finnish and Swedish.

Known for its vast forests, lakes, and natural beauty, Finland is one of the world's largest producers of forest products, such as paper, pulp, and lumber. One of the world's largest sea fortresses Suomenlinna, Rovaniemi with the "White Nights", dogsled safaris and of course the Northern Lights are what makes Finland so popular for tourists. Finland is one of the best places in the world to see the Northern Lights and attracts millions of tourists during its seasons.

Finland is home to a thriving technology industry and is widely recognized as one of the world's leading technology hubs. Companies such as Nokia and Rovio (creator of the popular game Angry Birds) are based in Finland. Some of the key factors that have contributed to Finland's success in technology include; strong investment in research and development, a highly educated workforce and fundings.

Finland has a strong educational system, and is widely regarded as one of the world's most literate countries. In fact, Finland's literacy rate is one of the highest in the world, and its students consistently perform well in international tests of math and reading ability.

Also, as a pioneer in environmental sustainability, Finland is known for its efforts to reduce its carbon footprint and promote clean energy. This Nordic country is also famous for its unique and distinctive cultural heritage, including its traditional folk music and its elaborate traditional costumes.

Helsinki, Finland's capital city, is the country's business center. Helsinki is Finland's largest city, and it is home to many of the country's major corporations and organizations, including many of the country's leading technology firms. The city is also a commercial, trade, and financial center, as well as one of the busiest ports in the Nordic region.

Take advantage of our diverse IT course offerings, spanning programming, software development, business skills, data science, cybersecurity, cloud computing and virtualization. Our knowledgeable instructors will provide you with practical training and industry insights, delivered directly to your chosen venue in Finland.

Introduction to Kotlin Training in Finland

Prerequisites

What You Will Learn

Outline