public ArrayList afficherListMaster(int mat) {
	// TODO Auto-generated method stub
	ArrayList list= new ArrayList<>();
		String msg= "SELECT * FROM postuler , specality WHERE postuler.matricule = "+mat+" and specality.id_spec = postuler.id_spec";

	Connection cnx =Mycnx.connect();
	try {
		Statement stat = cnx.createStatement();
		ResultSet res =stat.executeQuery(msg);

		while(res.next())
		{

			list.add(res.getString("specialiter"));
		}
		res.close();
		stat.close();
		cnx.close();

	} catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}finally
	{

		return list;
	}


}