Apache Lucene/Solr lucene/ is a search engine library solr/ is a search engine server that uses lucene To compile the sources run 'ant compile' To run all the tests run 'ant test' To setup your ide run 'ant idea' or 'ant eclipse' For Maven info, see dev-tools/maven/README.maven. For more information on how to contribute see: http://wiki.apache.org/lucene-java/HowToContribute http://wiki.apache.org/solr/HowToContribute