1

Introduction
What is Kotlin?
The Learning Curve
IDE
Android
Native
JavaScript

Basics
The package Statement

Defining Functions
Defining Local Variables
Comments
Strings Templates
The if Statement
Nullable Types
Type Checks
The for Loop
The while Loop
The when Expression
Ranges
Collections
Object Oriented
Coding Conventions

2

Coding Conventions *
Introduction
The Java Coding Conventions
The Colon Character
Lambda Expressions
Class Header Formatting
The Unit Type
Properties

Basic Types
Introduction
Numbers
Underneath Representation
Explicit Conversion
Operators
Floating Point numbers Conversion
Characters
Boolean
Arrays
Strings

Control Flow
Introduction
The if Expression
The when Expression
The for Loop
The while Loop

Packages
Introduction

The package Statement

The import Statement

The as Keyword

The import Statement

Top Level Declaration

Classes (Basic OOP)
The class Keyword

Constructors
Primary Constructor
Secondary Constructors
Default Constructor
Class Instantiation
Class Members

3

Classes (Inheritance)
The Any Class
The Base Class
The open Keyword
Overriding Methods
The final Keyword
Overriding Properties
The super Keyword
Overriding Rules
Abstract Classes
Companion Objects
Declaring Properties
Backing Properties
Compile Time Constants
Late Initialized Properties & Variables

4

Classes (Interfaces)
Interfaces
Interfaces Hierarchy
Interface Methods Implementation
Interfaces Conflicts

Classes (visibility)
Visibility Modifiers
Visibility Modifiers inside Packages
Visibility Modifiers inside Classes
Visibility Modifiers inside Modules

Classes (Data Classes)
Introduction to Data Classes
Code Samples
The copy Function

Classes (Sealed Classes)
Introduction to Sealed Classes
Sealed Classes Code Samples
Sealed Classes and The when Statement

5

Generics
Introduction

The our and in Modifiers
Generic Functions
Upper Bounds

Inner & Nested Classes
Introduction
Inner Class
Anonymous Inner Class
Nested Classes

6

Enum
Introduction
Simple Enum
Enum Constants are Objects
Anonymous Classes
Implementing Interfaces
The valueOf Functions
The values Function

Objects
Introduction
Object Expression
Object Inheritance
Plain Simple Object
Anonymous Object Type
Enclosing Scope Variables
Object Declaration
Companion Objects

Functions
Introduction
Defining Functions
Default Arguments
Named Arguments
Vararg Named Arguments
Unit Returning Functions
Single Expression Value
Explicit  Return Type
Variable Number of Arguments
The infix Notation
Top Level Functions
Local Functions
Member Functions
Generic Functions
Tail Recursive Function

Enum in Java @
http://www.abelski.com/courses/j2se_intro/oop.pdf 

7

Exceptions
Introduction
The throw Expression
The try Expression
Checked Exceptions
The Nothing Type

Extensions
Introduction
Extension Functions
Extension Properties
Companion Objects Extensions
Top Level Extensions
Extensions as Members

Nullable
Introduction
Using Nullable Types
The Safe Call Operator
The let Operator
The ?: Elvis Operator
The !! Operator
The as? Operator
Collections of Nullable Type Objects

8

Collections
Introduction
Creating Lists and Sets
List Code Sample
Set Code Sample
Creating Map
Map Code Sample
Covariant Types
Samples
The filter Extension Method
The none Extension Method

Ranges
Introduction
The downTo() Function
The step() Function
The until() Function

Destructuring
Introduction
Data Classes
Destructuring in for Loop
Returning Multiple Values
Unused Variables

9

Lambdas (part 1)
Higher Order Functions
Function Types
Parameters Names
Combining Function Types
Instantiate Function Type
Compiler Inference
Function Type with Receivers
Invoking Function Type Instances
Function Literals
Lambda Expressions Syntax

Lambdas (part 2)
The Function Last Parameter
The id Implicit Parameter
The Returned Function
LINQ Style Lambda Expressions
The Underscore Style
Introduction to Destructuring
Destructuring in Lambdas

10

Operators Overloading
Introduction
Unary Operators
Binary Operators
The in Operator
The indexed Access Operator
The invoke Operator
Augmented Assignment Operator
The Comparison Operators

Threads
Introduction
The fixRateTimer Function
The thread Function

Threads in Java @
http://www.abelski.com/courses/j2se_intro/threads.pdf 

Code Sample for wait and notify in Java @
https://javabook.co.il/wordpress/?p=114

11

Serialization
Introduction
The @Serializable Annotation

XML
Introduction
DOM Parser
Code Sample

additional slides about XML in Java @ http://lifemichael.com/moodle/course/view.php?id=236 

additional slides about DOM in Java @
http://lifemichael.com/moodle/course/view.php?id=222

JSON
Introduction
Klaxon Parser

Reflection
Introduction
Classes References
Properties References
Functions References
Callable References
Property References
Constructor References

12

I/O Streams
Introduction
The File Class
Extensions for File
The URL Class

Extensions for URL
The FileTreeWalk Class

additional slides about I/O in Java @
http://www.abelski.com/courses/j2se_intro/io.pdf
The OkIO Library *
TBA

Equality
Introduction
Structural Equality
Referential Equality

Idioms
Introduction
Data Classes
Function Parameters Default Values
Filtering List
Strings Interpolation
Instance Type Checking
Map Traversing
Range Traversing
Read Only List
Accessing Map
Lazy Property
Extension Methods
Singelton
If not Null Shorthand
Try & Catch Statement
Single Expression Functions
The with Statement

13

Using & Defining Annotations *      
Introduction
Jump Start
The @Target Annotation
The @Retention Annotation
The @Repeatable Annotation
The @MustBeDocumented Annotation
Code Samples
                   
Coding Conventions *
Introduction
The Java Coding Conventions
The Colon Character
Lambda Expressions
Class Header Formatting
The Unit Type
Properties

Unit Testing *
Introduction
JUnit 5
Samples

Inline Functions                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
Introduction
The inline Modifier
The noinline Modifier
Inline Properties

Dependency Injection *                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
TBA
     
Delegation
Introduction
Code Samples
Overriding
Code Samples

Kotlin Modules *
TBA

Kotlin Obfuscation *
TBA

The ‘this’ Keyword  
Introduction
Using this inside Extension Function
Using this inside Inner Scope
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
Networking
Introduction
The fuel Library
The Ktor Library

KDoc *
Introduction
KDoc Comments
Block Tags
Inline Markups
Module Documentation
Package Documentation

Calling Java from Kotlin
Calling Java from Kotlin
Getters and Setters
Methods Returning Void
Configuration
Mapped Types
Java Generics in Kotlin
Java Arrays
Java Varargs
Operators
Checked Exceptions
Objects Methods
Inheritance from Java Classes
Accessing Static Members
SAM Conversions
Using JNI
Calling Kotlin from Java
Properties
Package Level Functions
Instance Fields
Static Fields
Static Methods
Default Methods
Visibility
KClass
Signature Clashes
Overloads Generation
Checked Exceptions
Null Safety
Generics
The Nothing Type                                                                                   

14

Coroutines (part 1)
What is Coroutine?
The kotlinx.couroutoin Library
Simple Coroutines
Coroutines as Light Weight Threads
The Global Scope
The launch Function
The delay Function
The runBlocking Function
Structured Concurrency
The coroutineScope Function
Structured Coroutines
The suspend Modifier
Suspending Functions
Lightweight Threads
Global Coroutines as Daemon Threads

Coroutines (part 2) *
Cancelling The Coroutine Execution
The join Method
Coroutines Cancellation
The finally Block
Coroutine Timeout
Composing Suspending Functions
The async Function
Lazily Invocation of The async Function
Async Style Functions
Structured Concurrency
Coroutines Context and Dispatchers
Unconfined Dispatchers
Debugging Coroutines & Threads
Moving from One Thread to Another
Getting The Job from Context
Coroutines Childs
Naming Our Coroutines
Context Elements Combining
Coroutine Scope
Asynchronous Flow
Chanels
Closing Channels
Exceptions Handling