solr core configuration
solr installed directory 
		/opt/solr/solr-4.10.3
solr core directory
		/opt/solr/solr-4.10.3/example/solr


copy the core folder "collection1" on the same folder and name it as "arduino_core"
delete core.properties on arduino_core/
delete all files inside arduino_core/data/ directory
In arduino_core/conf directory edit schema.xml and add this lines to field list

  <field name="Tags" type="string" indexed="true" stored="true" multiValued="true"/>
  <field name="PostId" type="long" indexed="true" stored="true"/>
  <field name="AnswerCount" type="long" indexed="true" stored="true"/>
  <field name="ViewCount" type="long" indexed="true" stored="true"/>
  <field name="Score" type="long" indexed="true" stored="true"/>
  <field name="LastActivityDate" type="date" indexed="true" stored="true"/>
  <field name="Body" type="text_general"  stored="true"/>
  <field name="Title" type="string"  stored="true"/>

now go to http://localhost:8983/solr/#/
select Core Admin and click on "Add Core" button.
on name and instance_dir field type "arduino_core" and click add core button on that dialog.

now run the stackoverflow.SolrjPopulator java class to populate data to solr index and use stackoverflow.SolrjSearcher to query it.