final Map<String, Object> map = newHashMap();
        map.put("aaa", new Integer(1000));
        final Map<String, Object> map2 = newHashMap();
        BeanUtil.copyMapToMap(map, map2, converter(new NumberConverter("#,##0")));
        assertEquals("1,000", map2.get("aaa"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testCopyMapToMap_converter2() throws Exception {

  /**
   * <a href="https://tools.ietf.org/html/rfc3745">JP2K image format</a>.
   *
   * @since 28.1
   */
  public static final MediaType JP2K = createConstant(IMAGE_TYPE, "jp2");

  /* audio types */
  public static final MediaType MP4_AUDIO = createConstant(AUDIO_TYPE, "mp4");
  public static final MediaType MPEG_AUDIO = createConstant(AUDIO_TYPE, "mpeg");