final DecimalFormatSymbols symbol = getDecimalFormatSymbols(locale);
        return Character.toString(symbol.getDecimalSeparator());
    }

    private static DecimalFormatSymbols getDecimalFormatSymbols(final Locale locale) {
        DecimalFormatSymbols symbol;
        if (locale != null) {
            symbol = DecimalFormatSymbolsUtil.getDecimalFormatSymbols(locale);
        } else {

     */
    public static DecimalFormatSymbols getDecimalFormatSymbols() {
        return getDecimalFormatSymbols(LocaleUtil.getDefault());
    }

    /**
     * {@link DecimalFormatSymbols}を返します。
     *
     * @param locale
     *            ロケール。{@literal null}であってはいけません
     * @return {@link DecimalFormatSymbols}
     */
    public static DecimalFormatSymbols getDecimalFormatSymbols(final Locale locale) {

    /**
     * @throws Exception
     */
    public void testGetDecimalFormatSymbols() throws Exception {
        final DecimalFormatSymbols symbols = DecimalFormatSymbolsUtil.getDecimalFormatSymbols(Locale.GERMAN);
        System.out.println("DecimalSeparator:" + symbols.getDecimalSeparator());
        System.out.println("GroupingSeparator:" + symbols.getGroupingSeparator());
    }

        assertArgumentNotNull("locale", locale);

        if (s == null) {
            return null;
        }
        final DecimalFormatSymbols symbols = DecimalFormatSymbolsUtil.getDecimalFormatSymbols(locale);
        final char decimalSep = symbols.getDecimalSeparator();
        final char groupingSep = symbols.getGroupingSeparator();
        final StringBuilder buf = new StringBuilder(20);