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Kotlin training course

Name: Kotlin Training Course
Start: 2026-04-06 00:00
End: 2026-04-09 00:00
Location: Kotlin training course

Develop Android Apps or Java Backend applications with Kotlin - Reach A Growing And Powerful Mobile Web Audience

"I really enjoyed the practice work on the Android coding classes and Android app. I also thought that the basic Kotlin was taught thoroughly and with simplicity by the excellent trainer."

DCF, Senior Developer, Kotlin, February 2021

Public Courses

18/08/25 - 3 days

£1795 +VAT

Enrol

29/09/25 - 3 days

£1795 +VAT

Enrol

10/11/25 - 3 days

£1795 +VAT

Enrol

Customised Courses

* Train a team
* Tailor content
* Flex dates

From £1200 / day

Highlights Details Audience Feedback Prices/Dates Related Courses

Public Courses

Highlights

Learn Basics of Kotlin with Objects, variables and structure
Understand Object-Oriented Programming for Kotlin
Explore Functions, arguments and syntax
Utilise Function-oriented programming
Use Extensions: properties and functions
Learn Domain Specific Language
Work with collections and texts
Learn Generic with Covariance, contravariance and invariance
Understand Reflection: types, classes, functions, properties and Kotlin references
Apply Interoperability Between Kotlin and Java
Acquire skill in Android KTX for Android Backend and Java
Develop Android Apps or Java Backend applications with Kotlin

Course Details

Basics of Kotlin

Objects and variables
Type inference
Nullability and smart casting
Composite data types
Control structures
Comments

Object-Oriented Programming For Kotlin

Classes and properties, interfaces, abstract classes, enums, overriding methods and properties
Primary constructors and initialization blocks
Secondary constructors
Data classes
Object expressions
Object declarations and companion objects
Nested classes
Visibility modifiers
Sealed classes

Functions

Vararg parameters
Single-expression functions
Default arguments and named argument syntax
Top-level functions and properties
Local functions

Function-oriented programming For Kotlin

Functional type
Anonymous functions
Lambda expressions
Simpler lambda notation
Lambda functions under the hood
Higher-Order Functions
Last lambda in argument convention
Inline functions
Java Single Abstract Method lambda interface and usage of them in Java methods

Extensions

Extension functions
Extension properties
Function type with receiver, function literal with receiver, referencing extension functions
Predefined functional literals with a receiver

Domain Specific Language

Function types with receiver
Lambda expressions with receiver
Making your own DSL

Working with collections and texts

Collection literals
Basic collection processing functions
Collection predicates
Making collection flat and grouping it
Accumulating collections
Converting between collection types
Functions used to process texts and to accumulate collections to texts

Generics

Covariance, contravariance, and invariance
Common issues with bounded wildcards in Java
Declaration-site variance, use-site variance, and type projection
Declaring single and multiple constraints on types

Interoperability Between Kotlin and Java

Guidelines for mixed language codebases
Calling Java libraries from Kotlin
Preparing Kotlin to be used from Java
Annotations to work with Java annotation processing libraries

kotlin contracts

Contracts feature in Kotlin to alleviate compiler errors

Coroutines

Understanding suspend functions
Structured concurrency
Scope creation
Essential Kotlin Coroutines use-cases

Labs (Android)

Variety of Kotlin structures
How to use functions at different levels
How classes changed in Kotlin and how it influences Android development
What are object expression and object declaration
Functional programming features in Kotlin
What exactly are Data classes
How to use Sealed classes
You will understand deeply Kotlin type system
How to define and use Extension functions
How to do expressive and efficient collection processing in Kotlin
What are and how to use Scope functions (let, apply, run, also, with, takeIf, takeUnless)
What are generic variance modifiers, how to use them and what are the limitations
Why inline classes are useful and important
How to create and use Kotlin property and interface delegates
How to use and create Kotlin DSL
How to write Kotlin code in an idiomatic way
What are Kotlin code conventions and guideline

Labs (Java/Backend)

Basic Kotlin structures
Functions on different levels and functional style
Kotlin OO programming in Android
Data classes
Sealed classes
Object expression, object declaration and companion object
Kotlin type system
Extension functions
Functional programming in Kotlin
Collections and string processing
Scope functions (let, apply, run, also, with, takeIf, takeUnless)
Generic classes and functions, making own collection processing function
Kotlin generic type parameter declarations and modifiers
Kotlin property and interface delegates
Reflection in Kotlin, and how to use Java reflection in Kotlin
DSL usage and creation
Interoperability between Kotlin and Java
Basics of Kotlin coroutines
Rules of idiomatic Kotlin
Kotlin style guides

Who should attend

Software developers with Java or equivalent language skills looking to develop commercial applications on Google's Android platform or Backend Applications with Kotlin

Feedback

4.8 out of 5 average

"I really enjoyed the practice work on the Android coding classes and Android app. I also thought that the basic Kotlin was taught thoroughly and with simplicity by the excellent trainer."

DCF, Senior Developer, Kotlin, February 2021

“JBI did a great job of customizing their syllabus to suit our business needs and also bringing our team up to speed on the current best practices. Our teams varied widely in terms of experience and the Instructor handled this particularly well - very impressive”

Brian F, Team Lead, RBS, Data Analysis Course, 20 April 2022

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More about this course

Our Kotlin training course will focus on teaching Kotlin from beginner to an intermediate/advanced level.

Typically Kotlin is used for Development of Android Apps or Backend applications with Java.

This course will help delegates understand the pure Kotlin Language and Best practices for using it in anger. Delegates can choose to keep Labs as "vanilla" Kotlin, or to apply to Android or Java development.

In this course we will focus on practical Kotlin development. We will briefly go over the Kotlin language in the ways it is equivalent to Java. We will spend a bit of time introducing concepts that Kotlin provides that are not found in Java.

Following that, we will begin to learn Kotlin development by creating an Android application using all of the modern libraries and technologies that are necessary for a successful commercial application.

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CONTACT
+44 (0)20 8446 7555

[email protected]

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