Kotlin 1.1 introduces several new features including support for JavaScript targeting which is no longer experimental, coroutines which enable asynchronous programming, improved Spring support with new plugins, type aliases, bound callable references, and various other improvements to lambdas, properties, and the standard library. Kotlin 1.1.1 enables faster Gradle compilation and 1.1.2 requires JDK 8 to run the Kotlin compiler. The presentation discusses these new features and capabilities in Kotlin 1.1.

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Thiago “Fred" Porciúncula
KOTLIN 1.1! WHAT’S NEW?

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Kotlin | What is it?
• JetBrains
• JVM
• Conciseness, safety, interoperability

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Kotlin | What is it?
• JetBrains
• JVM
• Conciseness, safety, interoperability
❤

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“Our vision for Kotlin is to enable the use of a single
expressive, performant, strongly typed language across all
components of a modern application.”

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1. JAVASCRIPT

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Kotlin 1.1 | JavaScript
• JavaScript target is no longer experimental
• ECMAScript 5.1, plans to target ECMAScript2015
• JS libs available through typed APIs

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Kotlin 1.1 | JavaScript
• JavaScript target is no longer experimental
• ECMAScript 5.1, plans to target ECMAScript2015
• JS libs available through typed APIs

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external fun require(module:String):dynamic
fun main(args: Array<String>) {
val express = require("express")
val app = express()
app.get("/", { req, res ->
res.type("text/plain")
res.send("i am a beautiful butterfly")
})
app.listen(3000, {
println("Listening on port 3000")
})
}
https://medium.com/@Miqubel/your-first-node-js-app-with-kotlin-30e07baa0bf7

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Kotlin 1.1 | JavaScript - Goals
• Provide output that is optimal in size
• Provide output that is readable JavaScript
• Provide interoperability with existing module systems
• Provide the same functionality in the standard library
whether targeting JavaScript or the JVM (to the largest
possible degree).

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“OUR GOAL IS TO ENABLE PLEASANT FULL-STACK
DEVELOPMENT WITH KOTLIN.”

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2. COROUTINES

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Kotlin 1.1 | Coroutines

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Kotlin 1.1 | Coroutines
• Light-weight thread that can be suspended and
resumed later

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Kotlin 1.1 | Coroutines
• Light-weight thread that can be suspended and
resumed later
• Language feature implemented by libraries

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Kotlin 1.1 | Coroutines
• Light-weight thread that can be suspended and
resumed later
• Language feature implemented by libraries
• This potentially brings to Kotlin async/await from C#
and ECMAScript, channels and select from Go, and
generators/yield from C# and Python

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Kotlin 1.1 | kotlinx.coroutines
• Rx
• CompletableFuture
• NIO
• JavaFx
• Swing
https://github.com/Kotlin/kotlinx.coroutines

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Kotlin 1.1 | Coroutines
Coroutines is still experimental and not enabled by default.

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SPRING

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Kotlin | Spring

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Kotlin | Spring

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Kotlin | Spring
• kotlin-spring plugin from Kotlin 1.0.6

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Kotlin | Spring
• kotlin-spring plugin from Kotlin 1.0.6
• kotlin-jpa plugin from Kotlin 1.1!

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WHAT ELSE?

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Kotlin 1.1 | Type alias
A type alias allows you to define an alternative name for
an existing type.

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Kotlin 1.1 | Bound callable references
You can now use the :: operator to get a member
reference pointing to a method or property of a specific
object instance.

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Kotlin 1.1 | More news
• Data class inheritance
• Local delegated properties
• Underscores in numeric literals

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Kotlin 1.1 | Property accessors
Type inference on getters

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Kotlin 1.1 | Property accessors
Type inference on getters
Inline property accessors

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Kotlin 1.1 | Lambdas
Destructuring in lambdas

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Kotlin 1.1 | Lambdas
Underscores for unused parameters

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Kotlin 1.1 | Lambdas
Underscores for unused parameters

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Kotlin 1.1 | More news again
• Java 8 bytecode support
• Java 8 standard library support
• Constant inlining (const val)
• Several improvements on the standard library

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LATEST UPDATES

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Kotlin 1.1.1
Gradle incremental compilation is now enabled by default.

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Kotlin 1.1.1
Gradle incremental compilation is now enabled by default.
Kotlin 1.1.2
The Kotlin compiler now requires JDK 8 to run.

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JAVA 9

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OBRIGADO
WE ARE HIRING !