. . .
Properties configuracion = new Properties();
try {
  configuracion.load(new FileInputStream("configuracion.conf"));
  usuario = configuracion.getProperty("user");
  password = configuracion.getProperty("password");
  servidor = configuracion.getProperty("server");
  puerto = Integer.valueOf(configuration.getProperty("port"));
} catch (FileNotFoundException fnfe ) { 
  fnfe.printStackTrace();
} catch (IOException ioe) { 
  ioe.printStackTrace();
}
. . .