public static String Server="192.168.0.26:1433";
   public static String DataBase="TEST_CON";
   public static String Username="sa";
   public static String Password="12345678";

   public static Connection Abrir() throws ClassNotFoundException, SQLException, InstantiationException, IllegalAccessException
   {
        Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
        Connection conn = DriverManager.getConnection("jdbc:sqlserver://"+conexao.Server+ ";databaseName="+conexao.DataBase,conexao.Username,conexao.Password);
        return conn;
   }

public int Testar() throws ClassNotFoundException, SQLException, InstantiationException, IllegalAccessException {
    int u = 0;
    Connection conn = conexao.Abrir();
    Statement MW = conn.createStatement();
    ResultSet rs = MW.executeQuery("SELECT*From Tb_utilizador order by Nome");

    while (rs.next()) {
        u = 1;
    }
    return u;
}

try {
       b.Testar();
       }
   catch (ClassNotFoundException e)
   {
      Mensagem("Erro1",""+e.getMessage());
   }
   catch (InstantiationException e)
   {
        Mensagem("Erro2",""+e.getMessage());
   }
   catch (IllegalAccessException e)
   {
     Mensagem("Erro3",""+e.getMessage());
   }
   catch (SQLException e)
   {
     Mensagem("Erro4",""+e.getMessage());
   }