Java MongoDB 3.0+ query between timestamps -

how query database entries within 2 timestamps in java mongodb 3.0?

currently using java method, doesnt in returning set of documents within start , end timestamp criteria. code bit broken because returns latest entry if falls within timestamp.

public static reading getreadingsbetween(string type,timestamp starttime,timestamp endtime) {     mongoclient mongo = new mongoclient("localhost", 27017);      mongodatabase db = mongo.getdatabase("sampledb");      mongocollection<document> newcoll;      gson gson = new gson();      newcoll = db.getcollection("samplecollection");     document latestentry = newcoll.find().iterator().next();     string json = latestentry.tojson();     reading reading = gson.fromjson(json, reading.class);     string thistimestamp = reading.getgw_timestamp();     dateformat df = new simpledateformat("yyyy-mm-dd hh:mm:ss");     date parsedtimestamp = null;     try {         parsedtimestamp = df.parse(thistimestamp);     } catch (parseexception e) {         return null;     }     timestamp gwtimestamp = new timestamp(parsedtimestamp.gettime());     mongo.close();     if (gwtimestamp.after(starttime) && gwtimestamp.before(endtime)) {         return reading;     }     return null; } 

what want set of database entries within 2 timestamps. how do in java mongodb 3.0?

the basic query (using 3.x driver functions)

finditerable<document> findcursor         = newcoll.find(             filters.and(                 filters.gte("timestamp_field", starttime),                 filters.lte("timestamp_field", endtime))); 

this yield collection of document objects (and map them expected result.)