code: public static void readState(String fname) {
  
      filename = fname;
      
      try {
        persData.load(new FileInputStream(filename));
      } catch (FileNotFoundException e1) {
        // ignore
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
docs: Read the state of parsing for all open log files from a property
  file.
  
  @param fname the filename of the property file to be read