Kotlin in the age of digital transformation

1. http://meetup.kotlinhyderabad.in
In The Age Of
Digital Transformation
Rajmahendra Hegde
Java Champion, Kotlin Hyderabad Lead
rajonjavagmail.com
@rajmahendrar

2. About me
●
Java developer since 2000
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Started as Java Developer
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Working for a Bank as a Tech. Agile coach/SM
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Agilist by day and Hacker/Community Guy at night and
weekends! (including holiday)
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Java Champion
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Founder/lead 4! User Groups
– JUG Chennai - 2010 to 13
– Hyderabad Java User Group 2013-17
– Hyderabad Scala Community 2017-18
– Kotlin Hyderabad Community – since 2020
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JCP Individual Member. Expert Group member
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Open Source Contributor (Java, JavaFX, Scala)
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FOSS & Linux Enthusiast
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Interest: Indoor Garden, Hydroponic, Sustainable living
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https://rajmahendra.github.io/

3. Agenda
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JVM Language
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Polyglot programming
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DSL
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What is
●
Features
●
Timeline
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Release
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Different aspects
– JVM
– Build/Gradle
– Server/Spring
– JS
– Mobile and Android
– TornadoFX
●
How to get involved
●
How you can get more from Community
Also we have
– Getting Started with Kotlin
– Demo
– Code Snippets

4. JVM Languages

5. Polyglot programming

7. Kotlin
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General purpose language
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Statically typed
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Cross platform
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Concise
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Safe
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Interoperable
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Tool-friendly
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Modern
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OOP + Functional
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Coroutines
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Open Source (Apache 2.0)
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Developed by Jet Brains

8. The State Of The Octoverse https://octoverse.github.com/

9. Kotlin Timeline
●
2010 - Project Started
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2012 – Open sourced (Apache 2.0)
●
2016
– First major release Kotlin 1.0
– Kotlin Meets Gradle
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2017
– Kotlin 1.1RC
– Official on Android
– Kotlin support in Spring Framework 5.0
– Kotlin 1.2
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2018 – Kotlin 1.3

10. Releases & users
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1.0 -JVM/Android + Experimental JS - 200000
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1.1 – Stable JS + Experimental Coroutines - 500000
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1.2 – Experimental Multi platform - 2100000
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1.3 -Stable Coroutines + Kotlin/Native Beta - 4000000
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1.4-M3 Polishing

11. Default
language
Any
Platform
Any Level
Of Experience
Any Scale Any Application
Default
Language

12. Kotlin & Platform
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Kotlin/JVM
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Kotlin/Server
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Kotlin/JS
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Kotlin/Native

13. Full-stack Kotlin

14. Getting Started

15. Stdlib (kotlin.*)
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annotation
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browser
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collections
●
comparisons
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concurrent
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contracts
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coroutines
●
dom
●
experimental
●
io
●
js
●
jvm
●
math
●
native
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native
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properties
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random
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ranges
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reflect
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sequences
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steams
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system
●
text
●
time
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cinterop
●
w3c

16. Kotlin/JVM
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Variables
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Functions
– Default parameters
– Single expression
– Extended function
– Extension properties
– Higher order function
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Immutability and null
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Lambdas
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Collections
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Smart Casting
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Infix and operators
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Classes
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String and interpulation.
●
...

17. Kotlin/build/Gradle

18. Kotlin/server

19. Kotlin/server
Ktor is a framework for building asynchronous servers and
clients in connected systems using the powerful Kotlin
programming language.This website provides a complete
reference to the Ktor application structure and programming
interface.

20. For Kotlin/js Sprint + react multi platform
demo,visit following YouTube video
https://www.youtube.com/watch?v=rxb0IrNH5zs

21. Kotlin/Android

22. Kotlin/JS

23. Kotlin/server multi-platform Spring / React
Demo
https://www.youtube.com/watch?v=rxb0IrNH5zs
With the release of Spring Framework version 5, Spring announced support for
Kotlin. In this talk, we are going to build a Pet store application using Kotlin and
Spring Framework in a functional style and let me show how simple it is to develop
a Spring app in a functional style.

24. Kotlin/test

25. https://github.com/edvin/tornadofx

26. https://kotlinlang.org/community

27. Kotlin User Group
https://kotlinlang.org/user-groups/user-group-list.html
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Ahmedabad
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Allahabad
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Bengaluru / BlrKotlin
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Bhuhaneswar
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Bopal
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Coimbatore
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Hyderabad
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Indore
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Jalandhar
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Kolkata
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Kozhikode
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Mumbai
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Nagpur
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New Delhi
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Pune
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Surat
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Vellore
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Vijayawada
KUG in India, in 18 cities
http://meetup.kotlinhyderabad.in

28. http://meetup.kotlinhyderabad.in
Follow me:
Twitter: rajmahendrar
Github: rajmahendra
Instagram: rajmahendrar
Linkedin: rajmahendar
Slideshare: rajmahendra
Hyderabad Kotlin
Meetup: hyderabadkotlin
Twitter: hyderabadkotlin
Github: hyderabadkotlin
Rajmahendra Hegde
Java Champion, Kotlin
Hyderabad Lead
rajonjava@gmail.com
@rajmahendrar