Intro to Kotlin Training Course

Who should attend

This course is aimed at software developers looking to learn Kotlin from the ground up.

Prerequisites

Delegates should have experience programming in another language such as JavaScript, C#, Python, or Java.

Live, instructor-led online and on-site training

This Kotlin course is available for private / custom delivery for your team - face-to-face, on-site at your location of choice, or remotely via MS Teams, Zoom or your own platform - get in touch to find out how we can deliver tailored training which focuses on your project requirements and learning goals.

Course Overview

• Introduction to the course
• Course Outline
• Introductions

Introduction to Kotlin

• Kotlin Environment and the JVM
• Android Studio Environment
• Setting up an Android Studio Project
• Kotlin Hello World program
• Comments, Annotations

Lab: Hello World in Kotlin using Android Studio

Kotlin Classes

• Class definitions
• Constructors, named constructor parameters, default values
• Secondary Constructors
• Simple Properties
• Instance Creation
• Member Functions
• Function Named Parameters
• Function Default Parameters
• Function Vararg Parameters
• Functions returning Values
• Converting instances to Strings

Lab: Books and Bookshop app in Kotlin using Android Studio

Session 3: Objects, flow of control and Further Properties

• Objects
• Companion Objects
• Flow of control
• Self reference: This
• Accessing Masked properties
• Properties and their Types
• Property Visibility
• Property Declaration Modifiers
• Custom property functions
• Nullability
• Nullable Operators
• Lazy properties
• Instance Equality
• Curly Bracket Syntax

Lab: Adding behaviour to the Bookshop

Inheritance

• Inheritance in Kotlin
• Implementing Inheritance
• Rule for overriding functions
• Overriding Properties
• Rules for Polymorphic variables
• Casting and Inheritance
• The super variable
• Constructors and Inheritance

Lab: Defining Inheritance for Book class

Abstract classes and Interfaces

• Abstract Classes
• Defining an Abstract Class
• Declaring abstract functions
• Extending an Abstract Class
• Interfaces as Contracts
• Interfaces in Kotlin
• Interface Definitions
• Implementing Interfaces
• Delegation

Lab: abstract classes and interfaces

Further Classes

• Four Types of Nested Classes
• Nested classes
• Member Inner Classes
• Method Inner Classes
• Anonymous Classes / Objects
• Sealed Classes
• Inline classes
• Data Classes
• Data Classes and Destructuring Declarations
• Operators
• Infix Member Functions
• Enumeration support
• Kotlin Annotations

Lab: Implementing Data classes

Containers and Generics

• Arrays
• Collections Library
• Mutable and Immutable (read-only) collections
• Sets, Lists and Maps
• Pairs and Triples
• Collection iteration

Lab 7: Working with Containers

Functions

• What is Functional Programming?
• Kotlin as a Functional Language
• Defining Functions
• Function Objects
• Function Definitions
• Named Functions, Single Expression & Inline functions
• Anonymous Functions and Lambdas
• Callable References
• Closures
• Functions and Methods
• SAM Interfaces

Lab: Functions

Higher Order Functions and Extension Functions

• Higher Order Functions Introduction
• Functions as Parameters
• Using Typealias for function types
• Functions as Return types
• Collections & FP: foreach
• Scope functions (apply, let, also, run and with)
• Conditional functions (takeIf, takeUnless)
• Extensions
• Extension Functions and Extension properties
• Infix Extensions
• Looping over Collections
• Sorting Collections
• Grouping, Folding, Reducing and Zipping Collections

Lab: Processing containers using higher order functions

Packages and Project Structuring

• What is a Package?
• Kotlin Compiler
• Importing
• Kotlin Default Imports
• Visibility Modifiers
• Visibility Modifiers and Constructors
• Kotlin Modules

Exception Handling

• Errors & Exceptions
• Exception types in Kotlin
• Part of the Exception Hierarchy
• Exception Handling
• Kotlin and Checked Exceptions
• Try-Catch Expressions
• Finally and returned values
• Defining New Exceptions
• Chained Exceptions

Lab: Adding Exception handling to the bookshop