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Kotlin @ Jfokus, 33rdDegree

AB

Andrey Breslav

Transcript

If...

If you are happy with

Swahili

you don't need Kotlin

What

Why

What

Why

Kotlin is...

not

?

Kotlin is

Java is a Great Platform!

... Never create a programming language ...

Target Platforms

1/2

A modern language

  • Statically typed
  • General-purpose
  • Open Source
  • For Industrial Use

> 50K classes

Java

JavaScript

written in Java

2002: Java 1.4 — IntelliJ 3.0

2004: Java 5 — IntelliJ 4.0

www.coffeekultures.com

3.5 Compilers

X

≈

  • NOT a Research Project
  • NOT a Domain-Specific Language
  • NOT a Proprietary Language

Compiler

2012: Java 6 — IntelliJ 11

by

Andrey Breslav

Lead Language Designer

Design Goals

Environment Friendly

100% Java-compatible

  • Expressive
  • Type-Safe

Productive

Learnable!

  • Concise
  • Fast

Well-Supported by Tools

Open Source

2012

Apache 2 License

Timeline

http://github.com/jetbrains/kotlin

Beta

M1

M2

M3

Parts of

Use at

Bootstrap

Spec & Release (v. 1.0)

Examples

Kotlin

Java

Kotlin

Java

Builders

Type-Safe

Hello, world!

Classes

Extension Functions

Higher-Order Functions

Operator Overloading

Null-Safety

Smart Casts

Annotations

Nobody likes NPEs...

Safe Calls

Data Flow

Smart Cast

Kotlin

Java

Rename

on

import

Annotations

as

modifiers

More

Making

Java Platform

  • Traits (code in interfaces)
  • First-class delegation
  • Modules
  • Generics with proper variance
  • ...

a Better Place

http://jetbrains.com/kotlin

Challenge

Web Demo:

  • kotlin-demo.jetbrains.com

http://kotlin-demo.jetbrains.com

Twit It

Write Kode

Competition:

  • Most retweets (minimum of 20)
  • By next Monday, March 26

Wins

IntelliJ IDEA Ultimate

Open Source

http://github.com/JetBrains/Kotlin

Apache 2 License

Kompiler

IntelliJ IDEA Plugin

Kontribute

Recently Contributed

Patches

Libraries

Tools

Collection & IO

utilities

by James Strachan

Ant & Maven

by Evgeny Goldin

Resources

Home Page: jetbrains.com/kotlin

Web Demo: kotlin-demo.jetbrains.com

Blog: blog.jetbrains .com/kotlin

Forum: Kotlin at devnet.jetbrains.com

http://github.com/jetbrains/kotlin

Twitter:

  • @project_kotlin
  • @abreslav
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