Update using ObjectId as String in Java Interface (Swing)

Hi, I 'm trying to update a field knowing _id created by default MongoDB . What I do is that I insert a JTextField as a string, and then attempt to use it to update but I do not update anything. I understand it is because one is an object and the other is a String, so do not know if there is any option to turn it back into a objectid .

VisitasUpdate.update (new BasicDBObject ("_ id" , " 549d424be4b0a16103ec046f " ) ,
new BasicDBObject ( " $ set " new BasicDBObject ( "Time Check ", " 19:46:59 "))) ;



Have you tried the ObjectId constructor that takes a String parameter?

   http://api.mongodb.org/java/current/org/bson/types/ObjectId.html#ObjectId(java.lang.String)

I'm using this code and works ok:

 ObjectId Id = new ObjectId("549d424be4b0a16103ec046f");

                  VisitasUpdate.update(new BasicDBObject("_id", Id),

                  new BasicDBObject("$set", new BasicDBObject("Hora Consulta", "21:46:59")));