code: private static String cleanString(String str)
      {
  	String result = str;
  	result = result.replace("\r", "");
  	result = result.replace("\n", "");
  	result = result.replace("\t", "");
  
  	return result;
      }
docs: Cleans the special symbols (e.g., "\t", "\n") in a string
  @param str
  the string to be checked
  @return the cleaned string