🚀 go-pugleaf

I would like to use an application as applet and standalone; the
following code is generated by JBuilder:

  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

when the class is run as an applet, the parameters are read from the
html file, but when run as stand alone, how are the parameter read, from
wich file? does System.getProperty() read from a specific file?

Help will be appreciated.
Thankx