Solrj is a java client to access solr. It offers a java interface to add, update, and query the solr index. This page describes the use of the SolrJ releases included with Solr 1.4.x releases, with the 1.4.x war files. For information on using SolrJ with Solr1.3 and Solr1.2, see the Solrj1.3 page. SolrJ/Solr cross-version compatibility SolrJ generally maintains backwards compatibility, so you can