assertNotNull(TimeoutManager.getInstance().thread);
        Thread.sleep(2000);
        assertEquals(count, expiredCount);
        assertEquals(1, TimeoutManager.getInstance().getTimeoutTaskCount());
        task.cancel();
        Thread.sleep(2000);
        assertEquals(0, TimeoutManager.getInstance().getTimeoutTaskCount());
        assertNull(TimeoutManager.getInstance().thread);
    }

     *             {@link NoSuchAlgorithmException}が発生した場合
     */
    public static MessageDigest getInstance(final String algorithm) {
        assertArgumentNotEmpty("algorithm", algorithm);

        try {
            return MessageDigest.getInstance(algorithm);
        } catch (final NoSuchAlgorithmException e) {
            throw new NoSuchAlgorithmRuntimeException(e);
        }
    }

    /**

        Cipher cipher = encryptoQueue.poll();
        if (cipher == null) {
            final SecretKeySpec sksSpec = new SecretKeySpec(key.getBytes(), algorithm);
            try {
                cipher = Cipher.getInstance(algorithm);
                cipher.init(Cipher.ENCRYPT_MODE, sksSpec);
            } catch (final InvalidKeyException e) {
                throw new InvalidKeyRuntimeException(e);

        assertEquals(date, cal.getTime());
    }

    /**
     *
     * @throws Exception
     */
    @Test
    public void testLocalize() throws Exception {
        final Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("JST"));
        final Calendar local = CalendarConversionUtil.localize(calendar);
        assertEquals(TimeZone.getDefault(), local.getTimeZone());
    }

    /**
     * Test method for

            return (Calendar) o;
        }
        final java.util.Date date = DateConversionUtil.toDate(o, pattern);
        if (date != null) {
            final Calendar cal = Calendar.getInstance();
            cal.setTime(date);
            return cal;
        }
        return null;
    }

    /**
     * ローカルの{@link TimeZone}と{@link Locale}をもつ{@link Calendar}に変換します。
     *
     * @param calendar

     */
    protected static Calendar toCalendar(final Date date, final Locale locale) {
        final Calendar calendar;
        if (locale == null) {
            calendar = Calendar.getInstance();
        } else {
            calendar = Calendar.getInstance(locale);
        }
        calendar.setTime(date);
        return calendar;
    }

    /**
     * 文字列を{@link java.sql.Date}に変換します。
     *
     * @param str

    private TimeoutManager() {
    }

    /**
     * シングルトン用のインスタンスを返します。
     *
     * @return シングルトン用のインスタンス
     */
    public static TimeoutManager getInstance() {
        return instance;
    }

    /**
     * 処理を開始します。
     */
    public synchronized void start() {
        if (thread == null) {
            thread = new Thread(this, "CoreLib-TimeoutManager");

     */
    protected static Calendar toCalendar(final Date date, final Locale locale) {
        final Calendar calendar;
        if (locale == null) {
            calendar = Calendar.getInstance();
        } else {
            calendar = Calendar.getInstance(locale);
        }
        calendar.setTime(date);
        return calendar;
    }

    /**
     * 文字列を{@link Timestamp}に変換します。
     *
     * @param str

            throw new IORuntimeException(e);
        }
    }

    public static void deleteInBackground(final File file) {
        if (file != null) {
            TimeoutManager.getInstance().addTimeoutTarget(() -> {
                try {
                    Files.deleteIfExists(file.toPath());
                } catch (final IOException e) {
                    throw new IORuntimeException(e);

     */
    protected static Calendar toCalendar(final Date date, final Locale locale) {
        final Calendar calendar;
        if (locale == null) {
            calendar = Calendar.getInstance();
        } else {
            calendar = Calendar.getInstance(locale);
        }
        calendar.setTime(date);
        return calendar;
    }

    /**
     * 文字列を{@link Time}に変換します。
     *
     * @param str