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Apache Lucene open-source search software

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README.md

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# Apache Lucene

![Lucene Logo](https://lucene.apache.org/theme/images/lucene/lucene_logo_green_300.png?v=0e493d7a)

Apache Lucene is a high-performance, full-featured text search engine library
written in Java.

[![Build Status](https://ci-builds.apache.org/job/Lucene/job/Lucene-Artifacts-main/badge/icon?subject=Lucene)](https://ci-builds.apache.org/job/Lucene/job/Lucene-Artifacts-main/)
[![Revved up by Develocity](https://img.shields.io/badge/Revved%20up%20by-Develocity-06A0CE?logo=Gradle&labelColor=02303A)](https://develocity.apache.org/scans?search.buildToolType=gradle&search.rootProjectNames=lucene-root)

## Online Documentation

This README file only contains basic setup instructions. For more
comprehensive documentation, visit:

- Latest Releases: <https://lucene.apache.org/core/documentation.html>
- Nightly: <https://ci-builds.apache.org/job/Lucene/job/Lucene-Artifacts-main/javadoc/>
- New contributors should start by reading [Contributing Guide](./CONTRIBUTING.md)
- Build System Documentation: [help/](./help/)
- Migration Guide: [lucene/MIGRATE.md](./lucene/MIGRATE.md)

## Building

### Basic steps

1. Install JDK 25 using your package manager or download manually from
[OpenJDK](https://jdk.java.net/),
[Adoptium](https://adoptium.net/temurin/releases),
[Azul](https://www.azul.com/downloads/),
[Oracle](https://www.oracle.com/java/technologies/downloads/) or any other JDK provider.
2. Clone Lucene's git repository (or download the source distribution).
3. Run gradle launcher script (`gradlew`).

We'll assume that you know how to get and set up the JDK - if you don't, then we suggest starting at <https://jdk.java.net/> and learning more about Java, before returning to this README.

## Contributing

Bug fixes, improvements and new features are always welcome!
Please review the [Contributing to Lucene
Guide](./CONTRIBUTING.md) for information on
contributing.

- Additional Developer Documentation: [dev-docs/](./dev-docs/)

## Discussion and Support

- [Users Mailing List](https://lucene.apache.org/core/discussion.html#java-user-list-java-userluceneapacheorg)
- [Developers Mailing List](https://lucene.apache.org/core/discussion.html#developer-lists)
- IRC: `#lucene` and `#lucene-dev` on freenode.net

Repository info

Default branch: main
Latest version: releases/lucene/10.6.0
Created: 24/02/2021
Last activity: 12/11/2026
License: Apache-2.0
Open issues: 2.7k
Watchers: 85

Topics

backend information-retrieval java lucene nosql search search-engine

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