public static void konvertuj(String in, String out) throws IOException {

        File frJm = new File(in);
        File fwJm = new File(out);
        if (frJm.exists() == true) {
          FileReader fr = new FileReader(frJm);
          BufferedWriter fw = new BufferedWriter(
                                new OutputStreamWriter(
                                   new FileOutputStream(fwJm),
                                "UTF-8"));
          int c;
          //System.out.println(fr.getEncoding());
          while ((c = fr.read()) != -1)
              fw.write(c);

          fr.close();
          fw.close();
        }
    }