*/
    public static double toPrimitiveDouble(final Object o) {
        return toPrimitiveDouble(o, null);
    }

    /**
     * {@literal double}に変換します。
     *
     * @param o
     *            変換元のオブジェクト
     * @param pattern
     *            パターン文字列
     * @return 変換された{@literal double}
     */
    public static double toPrimitiveDouble(final Object o, final String pattern) {

     */
    public void testToPrimitiveDouble() throws Exception {
        assertEquals(1000.5, DoubleConversionUtil.toPrimitiveDouble("1,000.5"), 0);
    }

    /**
     * @throws Exception
     */
    public void testToPrimitiveDoubleForEmptyString() throws Exception {
        assertEquals(0, DoubleConversionUtil.toPrimitiveDouble(""), 0);
    }

    /**
     * @throws Exception
     */