Apache Lucene

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

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
• Build System Documentation: help/
• Migration Guide: lucene/MIGRATE.md

Building

Basic steps:

1. Install JDK 25 using your package manager or download manually from OpenJDK, Adoptium, Azul, Oracle 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 for information on contributing.

• Additional Developer Documentation: dev-docs/

Discussion and Support

• Users Mailing List
• Developers Mailing List
• IRC: #lucene and #lucene-dev on freenode.net