LocalTime.toString()

LocalTime.java

    public String toString() {
        StringBuilder buf = new StringBuilder(18);
        int hourValue = hour;
        int minuteValue = minute;
        int secondValue = second;
        int nanoValue = nano;
        buf.append(hourValue < 10 ? "0" : "").append(hourValue)
            .append(minuteValue < 10 ? ":0" : ":").append(minuteValue);
        if (secondValue > 0 || nanoValue > 0) {
            buf.append(secondValue < 10 ? ":0" : ":").append(secondValue);
            if (nanoValue > 0) {
                buf.append('.');
                if (nanoValue % 1000_000 == 0) {
                    buf.append(Integer.toString((nanoValue / 1000_000) + 1000).substring(1));
                } else if (nanoValue % 1000 == 0) {
                    buf.append(Integer.toString((nanoValue / 1000) + 1000_000).substring(1));
                } else {
                    buf.append(Integer.toString((nanoValue) + 1000_000_000).substring(1));
                }
            }
        }
        return buf.toString();
    }