// https://github.com/eclipse/rdf4j
import org.eclipse.rdf4j.query.resultio.sparqljson.SPARQLResultsJSONWriter;
import org.eclipse.rdf4j.repository.RepositoryException;
import org.eclipse.rdf4j.repository.sparql.SPARQLRepository;
import java.util.Collections;

/**
 * Wikidata RDF4J SPARQL example
 */
public class App
{
    public static void main( String[] args )
    {
        String sparqlEndpoint = "{ENDPOINT_URL}";
        SPARQLRepository repo = new SPARQLRepository(sparqlEndpoint);

        String userAgent = "Wikidata RDF4J Java Example/0.1 (https://query.wikidata.org/)";
        repo.setAdditionalHttpHeaders( Collections.singletonMap("User-Agent", userAgent ) );

        String querySelect = {SPARQL_QUERY};

        try{
            repo.getConnection().prepareTupleQuery(querySelect).evaluate(new SPARQLResultsJSONWriter(System.out));
        } catch ( Exception exception ) {
            exception.printStackTrace();
        }

    }
}