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kotlin

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A cross-platform programming language developed by JetBrains, supporting Android, iOS, desktop, and web development with Java interoperability.

v2.5.0-RC
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Latest release

v2.5.0-RCNov 11, 2026, 10:19 AMPre-release
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README

Project Overview

Kotlin is a cross-platform programming language developed by JetBrains. It is concise, safe, and interoperable with Java, supporting Android, iOS, desktop, and web development with Kotlin Multiplatform capabilities.

Key Features

  • Concise and safe modern programming language
  • Fully interoperable with Java
  • Kotlin Multiplatform: share business logic and UI across Android, iOS, desktop, and web
  • Supports Kotlin/JVM, Kotlin/JS, Kotlin/Native targets
  • Rich standard library and ecosystem
  • Maintained by JetBrains and community contributors

Target Audience

  • Android developers
  • Teams needing cross-platform development
  • JVM and Java developers

Quick Start

  1. Visit kotlinlang.org for getting started guides
  2. Create a Kotlin project in IntelliJ IDEA or Android Studio
  3. Try online at play.kotlinlang.org

Core Advantages

  • Fully interoperable with Java with low migration cost
  • Kotlin Multiplatform for cross-platform code sharing
  • Official support from JetBrains with an active community
  • Open-source and free (Apache 2.0)

System Requirements

  • OS: Cross-platform (requires JDK)

Release history

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