Sytac sLab Workshop

1. INTRODUCTION TO KOTLIN
SYTAC - SLAB
Shaun Thomas
shaunthomas999@gmail.com
www.shaunthomas999.com

2. WHY ARE YOU HERE?

3. SUPPORT IN INTELLIJ IDEA
PROGRAMMING LANGUAGE FROM JETBRAINS

4. OFFICIAL SUPPORT FOR ANDROID DEVELOPMENT
Google I/O 2017

5. SPRING SUPPORT
https://spring.io/blog/2017/01/04/introduc
ing-kotlin-support-in-spring-framework-5-0
http://start.spring.io/

6. GRADLE SUPPORT
Ø Use Kotlin for writing
Ø Gradle Script Kotlin
(build.gradle.kts)
Ø Plugins
Ø Benefits
Ø auto-completion and
content assist
Ø quick documentation
Ø navigation to source
Ø refactoring
https://blog.gradle.org/kotlin-meets-gradle
https://github.com/gradle/kotlin-dsl

7. INTERESTING FACTS
Started development in 2010 at Jetbrains
Open sourced in 2012
First official stable release v1 - Feb 15, 2016
(current release v1.1.4 – Aug 15, 2017)
Used in all Jetbrains IDEs
100% interoperable with Java
Syntax is similar to Swift
Influenced by Java, Scala, Groovy, C#, Gosu, JavaScript, Swift

8. TIME FOR “HELLO WORLD!”
Hands-on

9. DEFAULT IMPORTS
https://kotlinlang.org/docs/reference/packages.html

10. Android JVM
Browser Native
Kotlin
• App development
• Use Java 8 features with
Java 6 (highest
supported ver.)
• Wrapper for Java
• Alternative to other JVM
languages
Wrapper for Javascript
Native code generation for
different platforms incl. iOS
LANDSCAPE

11. ADVANCED HELLO WORLD!
Hands-on

12. VISIBILITY MODIFIERS
Top level declarations (classes,
functions, properties …)
Modifier Visibility
Public (default) world
Private file
Internal module
Members inside a class
Modifier Visibility
Public (default) world
Private class
Protected class and sub-class
Internal module

13. INTEROP WITH JAVA
Hands-on

14. DATA TYPES & CONTROL FLOWS
Walk through

15. CLASSES
Hands-on
+
Walk through

16. SAMPLE CODE GITHUB REPO
https://github.com/shaunthomas999/kotlin-workshop

17. CODING EXERCISE - 01
Hands-on

18. FUNCTIONS
Walk through

19. CODING EXERCISE - 02
Hands-on

20. DATA CLASSES
Hands-on

21. CODING EXERCISE - 03
Hands-on

22. SAMPLE SPRING-BOOT APPLICATION WITH
SPRING-DATA-REST
Walk through
https://github.com/shaunthomas999/spring-boot-data-rest-sample

23. CREATE PROJECT
Go to http://start.spring.io/

24. LET’S WORK ON THE EXERCISE NOW
Hands-on

25. EXTRA KOTLIN-MAVEN-PLUGIN
CONFIGURATION REQUIRED

26. ØGeneral syntax
<keyword> <name>: <Type>
ØThere is no ‘new’ operator in Kotlin
Ø By default Kotlin classes, properties and
functions are public and final
Ø Everything is an object in Kotlin
Ø Numbers, charcters and boolean can have
primitive values at runtime
Ø main() should not be inside a class

27. RESOURCES
https://kotlinlang.org/community/
https://kotlinlang.org/docs/reference/

28. THANK YOU
Shaun Thomas
shaunthomas999@gmail.com
www.shaunthomas999.com