sparql - Wikidata - resultset.hasNext() returns false despite the results are retrieved -

as title describes, resultset.hasnext() returns false unexpectedly.

here sparql query , java source code based on jena:

select ?s ?label { ?s rdfs:label ?label. filter(contains(lcase(?label), "university"@en)). } limit 5  query query = queryfactory.create(prefix + sparqlquery); queryexecution queryexecution = queryexecutionfactory.sparqlservice("https://query.wikidata.org/sparql", prefix + sparqlquery); try {     resultset results = queryexecution.execselect();     resultsetformatter.out(system.out, results, query);     while (results.hasnext()) { // returns false         querysolution querysolution = results.next();         system.out.println(querysolution.getresource("s"));     } } catch (exception ex) {     system.err.println(ex.getmessage()); } {     queryexecution.close(); } 

here output:

------------------------------------------------------ | s        | label                                   | ====================================================== | wd:q1060 | "technical university of hamburg"@en    | | wd:q1060 | "technical university of hamburg"@en-ca | | wd:q1060 | "technical university of hamburg"@en-gb | | wd:q1060 | "technical university of hamburg"@nl    | | wd:q4027 | "jean moulin university lyon 3"@en      | ------------------------------------------------------ 

you can iterate once on resultset, , happens in convenience method resultsetformatter.out(...)

i don't know whether need process resultset twice, if can create resultsetrewindable allows reset cursor:

query query = queryfactory.create(prefix + sparqlquery); queryexecution queryexecution = queryexecutionfactory.sparqlservice("https://query.wikidata.org/sparql", prefix + sparqlquery); try {     resultset rs = queryexecution.execselect();     resultsetrewindable results = resultsetfactory.copyresults(rs);     resultsetformatter.out(system.out, results, query);     results.reset();     while (results.hasnext()) { // returns false         querysolution querysolution = results.next();         system.out.println(querysolution.getresource("s"));     } } catch (exception ex) {     system.err.println(ex.getmessage()); } {     queryexecution.close(); }