Operation not allowed after ResultSet closed

@SuppressWarnings("deprecation")
	public void insertEtudiant() throws Exception{
		try{
			int codeLieu = getLieu();
			int codeNat = getNat();
			String codeF = getFiliere();
			int codeMotif = getMotif();
			
			String query = "INSERT INTO etudiant (bac,nom,prenom,genre,adresse,n_phone,mail,n_ccp,decision,bloque,"
					+ "n_ins,annee__encours,annee_univ,annee_courante,reste,"
					+ "an_1,an_2,an_3,an_4,an_5,an_6,an_7,an_8,an_9,an_10,"
					+ "cycle,nbr_annee,code_f,date_nais,code,code_nat,Observation,date_bloc,code_motif) "
					+ "VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

			stat = cnx.prepareStatement(query);
			stat.setString(1, txtBAC.getText());
			stat.setString(2, txtNom.getText());
			stat.setString(3, txtPrenom.getText());
			stat.setString(4, genre);
			stat.setString(5, txtAdr.getText());
			stat.setString(6, txtPhone.getText());
			stat.setString(7, txtMail.getText());
			stat.setString(8, (String)txtCCP.getValue());
			stat.setString(9, txtDec.getText());
			stat.setBoolean(10, bloc);
			stat.setString(11, txtIns.getText());
			stat.setString(12, txtAn.getText());
			stat.setString(13, txtUniv.getText());
			stat.setInt(14,new java.sql.Date(System.currentTimeMillis()).getYear());
			stat.setInt(15, reste);
			//stat.setInt(6, rds);
			stat.setInt(16, 0);
			stat.setInt(17, 0);
			stat.setInt(18, 0);
			stat.setInt(19, 0);
			stat.setInt(20, 0);
			stat.setInt(21, 0);
			stat.setInt(22, 0);
			stat.setInt(23, 0);
			stat.setInt(24, 0);
			stat.setInt(25, 0);
			stat.setString(26,txtBAC.getText());
			stat.setString(27, codeF);
			stat.setString(28, cycle);
			stat.setString(29, ((JTextField) dateChooser.getDateEditor().getUiComponent()).getText());
			stat.setInt(30, codeLieu);
			stat.setInt(31, codeNat);
			//stat.setInt(14, codePhoto);
			stat.setString(32, txtObs.getText());
			stat.setDate(33,new java.sql.Date(System.currentTimeMillis()));
			stat.setInt(34, codeMotif);
			
			stat.execute();

		}catch(SQLException ex){
			JOptionPane.showMessageDialog(null,"Problème insertEtudiant");
		}
		finally{
				stat.close();
		}
	}
	
	public void insertFils() throws SQLException{
		
		try{
			int codeP = insertPere();
			int codeM = insertMere();
			
			String query = "INSERT INTO fils_de (bac,code_p,code_m) VALUES (?,?,?)";
			stat = cnx.prepareStatement(query);
			stat.setString(1,txtBAC.getText());
			stat.setInt(2, codeP);
			stat.setInt(3, codeM);
		
			stat.execute();
			
		}catch(Exception ex){
			JOptionPane.showMessageDialog(null, "Problème insertFils");
		}
		finally{
			stat.close();
		}
	}