code: public boolean loadFromXML(File file) throws ParserConfigurationException,
        SAXException, IOException {
  
      Configuration newConf = new Configuration(this.conf);
  
      DocumentBuilder builder =
          DocumentBuilderFactory.newInstance().newDocumentBuilder();
      Document document = builder.parse(file);
  
      Element root = document.getDocumentElement();
      if (!"configuration".equals(root.getTagName()))
        return false;
      NodeList props = root.getChildNodes();
      for (int i = 0; i < props.getLength(); i++) {
        Node propNode = props.item(i);
        if (!(propNode instanceof Element))
          continue;
        Element prop = (Element) propNode;
        if (!"property".equals(prop.getTagName()))
          return false;
        NodeList fields = prop.getChildNodes();
        String attr = null;
        String value = null;
        for (int j = 0; j < fields.getLength(); j++) {
          Node fieldNode = fields.item(j);
          if (!(fieldNode instanceof Element))
            continue;
          Element field = (Element) fieldNode;
          if ("name".equals(field.getTagName()))
            attr = ((Text) field.getFirstChild()).getData();
          if ("value".equals(field.getTagName()) && field.hasChildNodes())
            value = ((Text) field.getFirstChild()).getData();
        }
        if (attr != null && value != null)
          newConf.set(attr, value);
      }
  
      this.conf = newConf;
      return true;
    }
docs: Overwrite this location with settings available in the given XML file.
  The existing configuration is preserved if the XML file is invalid.
  
  @param file the file path of the XML file
  @return validity of the XML file
  @throws ParserConfigurationException
  @throws IOException
  @throws SAXException