Reg Java Learning Git repo for Apache Lucene & Solr.

[Ganapathy Subramanian]

Hi ,
          I am in the Learning path of Apache Solr & Lucene capabilities
using Java Stack .
Could you kindly share me Git repo where I could find java programs to do
Indexing , Searching and Incremental Indexing for files in one root folder
and write the details in another folder .Could you kindly share any Git
Repo in terms of help with aboe quest with Solr & Lucene of 8.x
Thanks & Regards ,
Gps.