Formats durations to relative times

TimeFormatUtil.java

    public static Duration getRelativeDuration(Date date) {
        return Duration.ofMillis(Objects.requireNonNull(date).toInstant().toEpochMilli() - System.currentTimeMillis());
    }

    public static String formatRelativeDuration(Duration duration, boolean verbose) {
        if (duration.isZero()) return "now";
        String direction = duration.isNegative() ? "ago" : "later";
        duration = duration.abs();
        StringBuilder builder = new StringBuilder();
        if (!applyTimeFormat(builder, duration.toDaysPart(), "day") || verbose)
            if (!applyTimeFormat(builder, duration.toHoursPart(), "hour") || verbose)
                if (!applyTimeFormat(builder, duration.toMinutesPart(), "minute") || verbose)
                    applyTimeFormat(builder, duration.toSecondsPart(), "second");
        builder.append(" ").append(direction);
        return builder.toString();
    }
    
    private static boolean applyTimeFormat(StringBuilder builder, long amount, String timeType) {
        if (amount <= 0) return false;
        if (!builder.isEmpty()) builder.append(" ");
        builder.append(amount).append(" ").append(timeType);
        if (amount != 1) builder.append("s");
        return true;
    }

formatRelativeDuration(getRelativeDuration(new Date(), true)) -> 400 days 12 hours 13 minutes 14 seconds
formatRelativeDuration(getRelativeDuration(new Date(), false)) -> 400 days