rdf-query

import com.hp.hpl.jena.query.*;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.rdf.model.Property;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.vocabulary.VCARD;

import static com.hp.hpl.jena.query.QueryExecutionFactory.*;

public class Main {

    public static void main(String[] args) {

        Model model = ModelFactory.createDefaultModel();
        Resource portela = model
                .createResource("http://portela/me")
                .addProperty(VCARD.FN, "Rafael Portela");

        Resource marcos = model
                .createResource("http://marcos/him")
                .addProperty(VCARD.FN, "Markone");

        Property likes = model.createProperty("http://tw.com/verbs#", "likes");
        Property java = model.createProperty("http://tw.com/langs#", "java");
        Property ruby = model.createProperty("http://tw.com/langs#", "ruby");

        portela.addProperty(likes, java);
        portela.addProperty(likes, ruby);

        marcos.addProperty(likes, java);
        marcos.addProperty(likes, ruby);

        String query = "SELECT ?s WHERE {?s <"+ likes +"> <"+ ruby +"> }";
        ResultSet resultSet = create(query, model).execSelect();

        while (resultSet.hasNext()) {
            QuerySolution solution = resultSet.nextSolution();

            // ?s = <http://marcos/him>
            // ?s = <http://portela/me>
            System.out.println(solution);
        }
    }
}