Kotlin Standard Library

The Kotlin Standard Library provides living essentials for everyday work with Kotlin. These include:

  • Higher-order functions implementing idiomatic patterns (let, apply, use, synchronized, etc).
  • Extension functions providing querying operations for collections (eager) and sequences (lazy).
  • Various utilities for working with strings and char sequences.
  • Extensions for JDK classes making it convenient to work with files, IO, and threading.

Packages

kotlin

Core functions and types, available on all supported platforms.

kotlin.annotation

Library support for the Kotlin annotation facility.

kotlin.browser

Access to top-level properties (document, window etc.) in the browser environment.

kotlin.collections

Collection types, such as Iterable, Collection, List, Set, Map and related top-level and extension functions.

kotlin.comparisons

Helper functions for creating Comparator instances.

kotlin.concurrent

Utility functions for concurrent programming.

kotlin.coroutines.experimental

Library support for coroutines, including support for lazy sequences.

kotlin.coroutines.experimental.intrinsics

Low-level building blocks for libraries that provide coroutine-based APIs.

kotlin.dom

Utility functions for working with the browser DOM.

kotlin.experimental

Experimental APIs, subject to change in future versions of Kotlin.

kotlin.io

IO API for working with files and streams.

kotlin.js

Functions and other APIs specific to the JavaScript platform.

kotlin.jvm

Functions and annotations specific to the Java platform.

kotlin.properties

Standard implementations of delegates for delegated properties and helper functions for implementing custom delegates.

kotlin.ranges

Ranges, Progressions and related top-level and extension functions.

kotlin.reflect

Runtime API for Kotlin reflection

kotlin.reflect.full

Extensions for Kotlin reflection provided by kotlin-reflect library.

kotlin.reflect.jvm

Runtime API for interoperability between Kotlin reflection and Java reflection provided by kotlin-reflect library.

kotlin.sequences

Sequence type that represents lazily evaluated collections. Top-level functions for instantiating sequences and extension functions for sequences.

kotlin.streams

Utility functions for working with Java 8 streams.

kotlin.system

System-related utility functions.

kotlin.text

Functions for working with text and regular expressions.

org.khronos.webgl

Kotlin JavaScript wrappers for the WebGL API.

org.w3c.dom

Kotlin JavaScript wrappers for the DOM API.

org.w3c.dom.css

Kotlin JavaScript wrappers for the DOM CSS API.

org.w3c.dom.events

Kotlin JavaScript wrappers for the DOM events API.

org.w3c.dom.parsing

Kotlin JavaScript wrappers for the DOM parsing API.

org.w3c.dom.svg

Kotlin JavaScript wrappers for the DOM SVG API.

org.w3c.dom.url

Kotlin JavaScript wrappers for the DOM URL API.

org.w3c.fetch

Kotlin JavaScript wrappers for the W3C fetch API.

org.w3c.files

Kotlin JavaScript wrappers for the W3C file API.

org.w3c.notifications

Kotlin JavaScript wrappers for the Web Notifications API.

org.w3c.performance

Kotlin JavaScript wrappers for the Navigation Timing API.

org.w3c.workers

Kotlin JavaScript wrappers for the Web Workers API.

org.w3c.xhr

Kotlin JavaScript wrappers for the XMLHttpRequest API.

Index

All Types