Get specific set of triple from a model with jena

[Marco Tenti]

Hi, everyone , i need to get specific set of triple from my model Jena, i
have a very large set of triple and i want to check a specifc predicate for
each Graph (with graph i mean a set  o triple with the same subject), i
show you a example:

<http://myOntology#A> <http://schema.org/name> "Name".
<http://myOntology#A> <http://schema.org/surname> "Surname".
<http://myOntology#A> <http://schema.org/fullname> "Name Surname".

<http://myOntology#B> <http://schema.org/name> "Name".
<http://myOntology#B> <http://schema.org/fullname> "Name Surname".

In  this case i want to Get only the A resource or delete the B
resource,because the B don't have the triple with predicate surname, I know
i can do it with the SPARQL query and use Jena to get the result , but for
my reason i need to use a for or iterator cicle. something like this:
//LOAD MY MODEL
Model model = ModelFactory.createDefaultModel();
InputStream in = com.hp.hpl.jena.util.FileManager.get().open(
filepath+"\\"+filename );
if (in == null) {  throw new IllegalArgumentException( "File: " +
filepath+"\\"+filename + " not found");  }
RDFDataMgr.read(model, in, org.apache.jena.riot.Lang.N3);

//GET A LIST OF ALL  STATEMENT WITH SAME SUBJECT.......
List<List<Statement>> graphics = ............... //here i need help
//....WHERE THESE STATEMENT HAVE THE SAME SUBJECT
Statement stat1= graphics[0][1]
Statement stat2 = graphics[0][2]
..........................
//.......SO IN THE END
for(List<Statement> listStat : graphics){
     for(Statement sot :  listStat){
              if(sot.getPredicate().toString().Contains("
http://schema.org/surname";))
              {
                    //OK
              }else{
                   //FAIL
              }
     }
}
Ty in advance. Greetings.