code: public void ReInit(java.io.InputStream stream, String encoding) {
      try { jj_input_stream.ReInit(stream, encoding, 1, 1); } catch(java.io.UnsupportedEncodingException e) { throw new RuntimeException(e); }
      token_source.ReInit(jj_input_stream);
      token = new Token();
      jj_ntk = -1;
      jj_gen = 0;
      for (int i = 0; i < 23; i++) jj_la1[i] = -1;
    }
docs: Reinitialise.