Connection con;
    Statement stm;
    ResultSet rs;

    {
try {
  Class.forName("org.gjt.mm.mysql.Driver");

  con = DriverManager.getConnection
       ("jdbc:mysql://localhost/basededatos", "root", "");
    System.out.println("Conexión completa.");

  stm = con.createStatement();

  // rs = stm.executeQuery("SELECT * FROM alumnos");

  con.close();

} catch (Exception e){
    System.out.println("Error: " + e.getMessage());
}

}
    }