Creating Swing DSL with Kotlin

Presentation for first ever Kotlin Bosnia meetup held in Banja Luka.

This talk is live coding session aimed to present how Kotlin can help as in working with old Java toolkits such as Swing. The end result of talk is a small DSL for Swing that transforms Swing GUI components into more readable and concise code structures.

Code sample:
https://github.com/Vuksa/SwingDSL/tree/dsl_complete

Transcript

1. Creating Swing DSL with otlin Nebojša Vukšić
2. Nebojša Vukšić Android developer @ codecentric Founder of Kotlin User Group Serbia TheTechW0lf https://github.com/Vuksa
3. Kotlin User Group Serbia https://www.meetup.com/Serbia-Kotlin-User-Group https://www.facebook.com/kotlinserbia/ https://twitter.com/kotlin_serbia
4. Short introduction to Kotlin
5. What is Kotlin? statically-typed object oriented programming language targeting JVM, Android and JavaScript fully interoperable with Java third party library has excellent IDE support Google acknowledged
6. What is Kotlin? statically-typed object oriented programming language
7. What is Kotlin? statically-typed object oriented programming language targeting JVM, Android and JavaScript
8. What is Kotlin? statically-typed object oriented programming language targeting JVM, Android and JavaScript fully interoperable with Java
9. What is Kotlin? statically-typed object oriented programming language targeting JVM, Android and JavaScript fully interoperable with Java third party library
10. What is Kotlin? statically-typed object oriented programming language targeting JVM, Android and JavaScript fully interoperable with Java third party library has excellent IDE support
11. What is Kotlin? statically-typed object oriented programming language targeting JVM, Android and JavaScript fully interoperable with Java third party library has excellent IDE support Google acknowledged
12. Kotlin history developed by JetBrains unveiled to public in 2011.(development started in 2012.) 1.0 first stable version (February 2016.) current version 1.2 Beta
13. Why Kotlin? Its production ready!
14. DSL by Wikipedia A domain-specific language (DSL) is a computer language specialized to a particular application domain.
15. What is Swing?
16. What is Swing? GUI widget toolkit in Java
17. What is Swing? GUI widget toolkit in Java introduced in 1997
18. What is Swing? GUI widget toolkit in Java introduced in 1997 A Swing GUI consists of components and containers
19. What is Swing? GUI widget toolkit in Java introduced in 1997 A Swing GUI consists of components and containers Swing components are lightweight and don’t rely on peers
20. What is Swing? GUI widget toolkit in Java introduced in 1997 A Swing GUI consists of components and containers Swing components are lightweight and don’t rely on peers supports pluggable look and feel
21. Swing GUI code JFrame jfrm = new JFrame("A Simple Swing Program"); // Give the frame an initial size. jfrm.setSize(275, 100); // Terminate the program when the user closes the application. jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Create a text-based label. JLabel jlab = new JLabel(" Swing powers the modern Java GUI."); // Add the label to the content pane. jfrm.getContentPane().add(jlab); // Display the frame. jfrm.setVisible(true);
22. How we would like it to look like? frame(title = "A Simple Swing Program") { size = 275 x 100 defaultCloseOperation = EXIT_ON_CLOSE isVisible = true label(label = "Swing powers the modern Java GUI.") { } }
23. Enough of talking, lets do coding!
24. Other Kotlin DSLs • Anko - dsl for Android • Kobalt - dsl like build system • Kaadin - dsl for Vaadin • TornadoFX - JavaFx dsl framework
25. Resources to learn more • Official Kotlin documentation • Official Kotlin Github • Kotlin koans • Anko • TornadoFX • Kaadin • Kobolt • Awesome Kotlin – collection of materials • Slack kanal
26. Questions?.Answers!!
27. Thank you!
28. Nebojša Vukšić Android developer @ codecentric Founder of Kotlin User Group Serbia nebojsa92vuksic@gmail.com Kotlin User Group Serbia https://www.meetup.com/Serbia-Kotlin-User-Group https://www.facebook.com/kotlinserbia/ https://twitter.com/kotlin_serbia TheTechW0lf