1493     /**

  1494      * Converts this {@code LocalTime} to the number of seconds since the epoch

  1495      * of 1970-01-01T00:00:00Z.

  1496      * <p>

  1497      * This combines this local time with the specified date and

  1498      * offset to calculate the epoch-second value, which is the

  1499      * number of elapsed seconds from 1970-01-01T00:00:00Z.

  1500      * Instants on the time-line after the epoch are positive, earlier

  1501      * are negative.

  1502      *

  1503      * @param date the local date, not null

  1504      * @param offset the zone offset, not null

  1505      * @return the number of seconds since the epoch of 1970-01-01T00:00:00Z, may be negative

  1506      * @since 9

  1507      */

  1508     public long toEpochSecond(LocalDate date, ZoneOffset offset) {

  1509         Objects.requireNonNull(date, "date");

  1510         Objects.requireNonNull(offset, "offset");

  1511         long epochDay = date.toEpochDay();

  1512         long secs = epochDay * 86400 + toSecondOfDay();

  1513         secs -= offset.getTotalSeconds();

  1514         return secs;

  1515     }

  1516