| # Module stdlib |
| |
| ## Kotlin Standard Library |
| |
| The Kotlin Standard Library provides living essentials for everyday work with Kotlin. |
| These include: |
| - Higher-order functions implementing idiomatic patterns ([let][kotlin.let], [apply][kotlin.apply], [use][kotlin.io.use], [synchronized][kotlin.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. |
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| # Package kotlin |
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| Core functions and types, available on all supported platforms. |
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| # Package kotlin.annotation |
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| Library support for the Kotlin annotation facility. |
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| # Package kotlin.collections |
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| Collection types, such as [Iterable][kotlin.collections.Iterable], [Collection][kotlin.collections.Collection], |
| [List][kotlin.collections.List], [Set][kotlin.collections.Set], [Map][kotlin.collections.Map] and related top-level and extension functions. |
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| # Package kotlin.comparisons |
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| Helper functions for creating [Comparator][java.util.Comparator] instances. |
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| # Package kotlin.concurrent |
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| Utility functions for concurrent programming. |
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| # Package kotlin.io |
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| IO API for working with files and streams. |
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| # Package kotlin.jvm |
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| Functions and annotations specific to the Java platform. |
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| # Package kotlin.properties |
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| Standard implementations of delegates for [delegated properties](/docs/reference/delegated-properties.html) |
| and helper functions for implementing custom delegates. |
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| # Package kotlin.ranges |
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| [Ranges](/docs/reference/ranges.html), Progressions and related top-level and extension functions. |
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| # Package kotlin.reflect |
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| Runtime API for [Kotlin reflection](/docs/reference/reflection.html) |
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| # Package kotlin.reflect.jvm |
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| Runtime API for interoperability between [Kotlin reflection](/docs/reference/reflection.html) and |
| Java reflection. |
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| # Package kotlin.sequences |
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| [Sequence][kotlin.sequences.Sequence] type that represents lazily evaluated collections. Top-level functions for instantiating sequences |
| and extension functions for sequences. |
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| # Package kotlin.system |
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| System-related utility functions. |
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| # Package kotlin.test |
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| Functions for writing test assertions. |
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| # Package kotlin.text |
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| Functions for working with text and regular expressions. |
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