Examples of javax.time.Instant

javax.time.Instant
An instantaneous point on the time-line.
The Time Framework for Java models time as a series of instantaneous events, known as instants, along a single time-line. This class represents one of those instants.
A physical instant is an instantaneous event. However, for practicality the API and this class uses a precision of nanoseconds.
A physical instant could be at any point on an infinite time-line. However, for practicality the API and this class limits the measurable time-line to the number of seconds that can be held in a {@code long}. This is greater than the current estimated age of the universe.
In order to represent the data a 96 bit number is required. To achieve this the data is stored as seconds, measured using a {@code long}, and nanoseconds, measured using an {@code int}. The nanosecond part will always be between 0 and 999,999,999 representing the nanosecond part of the second.
The seconds are measured from the standard Java epoch of 1970-01-01T00:00:00Z. Instants on the time-line after the epoch are positive, earlier are negative.
This class uses the {@link TimeScales#simplifiedUtc() simplified UTC} time scale.The scale keeps in step with true UTC by simply ignoring leap seconds. This scale has been chosen as the default because it is simple to understand and is what most users of the API expect. If the application needs an accurate time scale that is aware of leap seconds then {@link TimeScaleInstant} shouldbe used.
Instant is immutable and thread-safe. @author Michael Nascimento Santos @author Stephen Colebourne

     * @param offset  the zone offset, not null
     * @return the offset date-time, never null
     * @throws CalendarConversionException if the instant exceeds the supported date range
     */
    public static OffsetDateTime fromInstant(InstantProvider instantProvider, ZoneOffset offset) {
        Instant instant = Instant.instant(instantProvider);
        ISOChronology.checkNotNull(offset, "ZoneOffset must not be null");
        
        long epochSecs = instant.getEpochSeconds() + offset.getAmountSeconds();  // overflow caught later
        long yearZeroDays = (epochSecs / ISOChronology.SECONDS_PER_DAY) + ISOChronology.DAYS_0000_TO_1970;
        int secsOfDay = (int) (epochSecs % ISOChronology.SECONDS_PER_DAY);
        if (secsOfDay < 0) {
            secsOfDay += ISOChronology.SECONDS_PER_DAY;
            yearZeroDays--;  // overflow caught later
        }
        LocalDate date = LocalDate.fromYearZeroDays(yearZeroDays);
        LocalTime time = LocalTime.fromSecondOfDay(secsOfDay, instant.getNanoOfSecond());
        LocalDateTime dateTime = LocalDateTime.dateTime(date, time);
        return new OffsetDateTime(dateTime, offset);
    }

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        /** {@inheritDoc} */
        @Override
        protected OffsetDateTime handleGap(
                TimeZone zone, ZoneRules rules, ZoneOffsetTransition discontinuity,
                LocalDateTime newDateTime, OffsetDateTime oldDateTime) {
            Instant instantBefore = discontinuity.getInstant().minusNanos(1);
            return OffsetDateTime.fromInstant(instantBefore, discontinuity.getOffsetBefore());
        }

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     * @param offset  the zone offset, not null
     * @return the offset date, never null
     * @throws CalendarConversionException if the instant exceeds the supported date range
     */
    public static OffsetDate fromInstant(InstantProvider instantProvider, ZoneOffset offset) {
        Instant instant = Instant.instant(instantProvider);
        ISOChronology.checkNotNull(offset, "ZoneOffset must not be null");
        
        long epochSecs = instant.getEpochSeconds() + offset.getAmountSeconds();  // overflow caught later
        long yearZeroDays = (epochSecs / ISOChronology.SECONDS_PER_DAY) + ISOChronology.DAYS_0000_TO_1970;
        long secsOfDay = epochSecs % ISOChronology.SECONDS_PER_DAY;
        if (secsOfDay < 0) {
            yearZeroDays--;  // overflow caught later
        }

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     *
     * @return the current offset date, never null
     * @throws CalendricalException if the date-time cannot be created
     */
    public OffsetDate offsetDate() {
        Instant instant = instant();
        return OffsetDate.fromInstant(instant, getZone().getRules().getOffset(instant));
    }

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     *
     * @return the current offset time, never null
     * @throws CalendricalException if the time cannot be created
     */
    public OffsetTime offsetTime() {
        Instant instant = instant();
        return OffsetTime.fromInstant(instant, getZone().getRules().getOffset(instant));
    }

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     *
     * @return the current offset date-time, never null
     * @throws CalendricalException if the date-time cannot be created
     */
    public OffsetDateTime offsetDateTime() {
        Instant instant = instant();
        return OffsetDateTime.fromInstant(instant, getZone().getRules().getOffset(instant));
    }

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     * @param instantProvider  the instant to convert, not null
     * @param offset  the zone offset, not null
     * @return the offset time, never null
     */
    public static OffsetTime fromInstant(InstantProvider instantProvider, ZoneOffset offset) {
        Instant instant = Instant.instant(instantProvider);
        ISOChronology.checkNotNull(offset, "ZoneOffset must not be null");
        
        long secsOfDay = instant.getEpochSeconds() % ISOChronology.SECONDS_PER_DAY;
        secsOfDay = (secsOfDay + offset.getAmountSeconds()) % ISOChronology.SECONDS_PER_DAY;
        if (secsOfDay < 0) {
            secsOfDay += ISOChronology.SECONDS_PER_DAY;
        }
        LocalTime time = LocalTime.fromSecondOfDay(secsOfDay, instant.getNanoOfSecond());
        return new OffsetTime(time, offset);
    }

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     *
     * @return the current offset date, never null
     * @throws CalendricalException if the date-time cannot be created
     */
    public OffsetDate offsetDate() {
        Instant instant = instant();
        return OffsetDate.fromInstant(instant, getZone().getRules().getOffset(instant));
    }

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     *
     * @return the current offset time, never null
     * @throws CalendricalException if the time cannot be created
     */
    public OffsetTime offsetTime() {
        Instant instant = instant();
        return OffsetTime.fromInstant(instant, getZone().getRules().getOffset(instant));
    }

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     *
     * @return the current offset date-time, never null
     * @throws CalendricalException if the date-time cannot be created
     */
    public OffsetDateTime offsetDateTime() {
        Instant instant = instant();
        return OffsetDateTime.fromInstant(instant, getZone().getRules().getOffset(instant));
    }

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