Binary package “liblucene2-java” in ubuntu bionic

Full-text search engine library for Java(TM)

 Lucene is a full-text search engine for the Java(TM) programming language.
 Lucene is not a complete application, but rather a code library and API
 that can easily be used to add search capabilities to applications.
 .
 This package contains the Lucene core library and a number of additional
 (contributed) libraries.