Introduction to Kotlin Training in Germany

  • Learn via: Classroom / Virtual Classroom / Online
  • Duration: 4 Days
  • Price: Please contact for booking options
We can host this training at your preferred location. Contact us!

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


Contact us for more detail about our trainings and for all other enquiries!

Upcoming Trainings

Join our public courses in our Germany facilities. Private class trainings will be organized at the location of your preference, according to your schedule.

06 Januar 2025 (4 Days)
Berlin, Hamburg, Münih
Classroom / Virtual Classroom
12 Januar 2025 (4 Days)
Berlin, Hamburg, Münih
Classroom / Virtual Classroom
13 Januar 2025 (4 Days)
Berlin, Hamburg, Münih
Classroom / Virtual Classroom
15 Januar 2025 (4 Days)
Berlin, Hamburg, Münih
Classroom / Virtual Classroom
17 Januar 2025 (4 Days)
Berlin, Hamburg, Münih
Classroom / Virtual Classroom
21 Januar 2025 (4 Days)
Berlin, Hamburg, Münih
Classroom / Virtual Classroom
06 Januar 2025 (4 Days)
Berlin, Hamburg, Münih
Classroom / Virtual Classroom
12 Januar 2025 (4 Days)
Berlin, Hamburg, Münih
Classroom / Virtual Classroom
Introduction to Kotlin Training Course in Germany

The Federal Republic of Germany is the second most populous country in Europe and is located in Central Europe. The official language of the country is German. Germany is one of the richest countries in the world. The main exports of the country include motor vehicles and iron and steel products.

Here are some fun facts about Germany:
The fairy tale writer, the Brothers Grimm, came from Germany and wrote many famous stories such as Cinderella, Snow White, and Sleeping Beauty.
Germany is home to the largest theme park in Europe, the Europa-Park.
The famous composer Ludwig van Beethoven was born in Germany.
The Autobahn, the German highway system, is known for having no general speed limit.


Berlin was divided by the Berlin Wall from 1961 to 1989. Known for its street art, Berlin has many colorful murals and graffiti throughout the city. Also, Berlin is home to many famous museums, such as the Pergamon Museum and the Museum Island. Many clubs and bars stay open until the early hours of the morning in this big city.

Another popular city is Munich, which is famous for its Oktoberfest beer festival that attracts millions of visitors every year. Munich is also home to many historic buildings, including Nymphenburg Palace and the Marienplatz town square.

The country's capital and largest city is Berlin, however Frankfurt is considered to be the business and financial center of Germany. It is home to the Frankfurt Stock Exchange, the European Central Bank, and many other financial institutions. Because of its central location within Europe and its status as a major financial hub, Frankfurt is often referred to as the "Mainhattan," a play on the city's name and its association with the Manhattan financial district in New York City.

Frankfurt is also a major transportation hub, with the largest airport in Germany and one of the largest in Europe, Frankfurt Airport. Additionally, it is a popular destination for tourists, with its historic city center, beautiful parks, and vibrant cultural scene.

Some of the top German technology companies like Siemens AG, Bosch, SAP SE, Deutsche Telekom, Daimler AG and Volkswagen has business centers in Frankfurt. The country has a strong tradition of engineering and innovation, and is home to many other world-class technology companies and research institutions.

Tailored to meet the specific needs of Germany, Bilginç IT Academy combines cutting-edge training methodologies with our comprehensive range of Certification Exam preparation courses and accredited corporate training programs. Experience a transformative approach to IT training that will redefine your expectations.
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