This date operates using the Symmetry010 calendar.
This calendar system is a proposed reform calendar system, and is not in common use.
The Symmetry010 differs from the Gregorian in terms of month length, and the leap year rule.
Dates are aligned such that 0001/01/01 (Sym010) is 0001-01-01 (ISO).
The alignment of January 1st happens 40 times within a 293 years cycle, skipping 5, 6, 11 or 12 years in between:
1, 7, 18, 24, 29, 35, 46, 52, 57, 63, 74, 80, 85, 91, 103, 114, 120, 125, 131, 142,
148, 153, 159, 170, 176, 181, 187, 198, 210, 216, 221, 227, 238, 244, 249, 255, 266, 272, 277, 283.
The implementation is a pure Symmetry010 calendar, as proposed by Dr. Irv Bromberg. The year shares the 12 months with the Gregorian calendar. The months February, May, August, November span 31 days, all other months consist of 30 days. In leap years, December is extended with a full week, the so-called "leap week". Thus December in a leap year has 37. Since each month is made of full weeks, the calendar is perennial, with every date fixed always on the same weekday. Each month starts on a Monday and ends on a Sunday; so does each year. The 13th day of a month is always a Saturday.
More information is available on Wikipedia at Symmetry010 or on the calendar's home page.
This class must be treated as a value type. Do not synchronize, rely on the identity hash code or use the distinction between equals() and ==.
| Modifier and Type | Field and Description |
|---|---|
| private final int | day
The day of the month. |
| private static final int[] | dayOfMonthOffset
Each 1st month of a quarter (month % 3 == 1) starts on a Monday, offset is 0. |
| private final transient int | dayOfYear
The day of year. |
| private final int | month
The month of the year. |
| private final int | prolepticYear
The proleptic year. |
| private static final long | serialVersionUID
Serialization version. |
| Access | Constructor and Description |
|---|---|
| private | Symmetry010Date(int
the Symmetry010 proleptic-year prolepticYear, int the Symmetry010 month, from 1 to 12 month, int the Symmetry010 day-of-month, from 1 to 30, or 1 to 31 in February, May, August, November,
or 1 to 37 in December in a Leap Year dayOfMonth)Creates an instance from validated data. |
| Modifier and Type | Method and Description |
|---|---|
| public ChronoLocalDateTime | atTime(LocalTime
the local time to use, not null localTime)Overrides default java. Combines this date with a time to create a |
| pack-priv static Symmetry010Date | Returns: the Symmetry010 datethe Symmetry010 proleptic-year prolepticYear, int the Symmetry010 month, from 1 to 12 month, int the Symmetry010 day-of-month, from 1 to 30, or 1 to 31 in February, May, August, November,
or 1 to 37 in December in a Leap Year dayOfMonth)Factory method, validates the given triplet year, month and dayOfMonth. |
| public static Symmetry010Date | Returns: the date in the Symmetry010 calendar system, not nullthe temporal object to convert, not null temporal)Hides java. Obtains a |
| public Symmetry010Chronology | Returns: the Symmetry010 chronology, not nullImplements java. Gets the chronology of this date, which is the Symmetry010 calendar system. |
| pack-priv int | |
| private int | |
| pack-priv int | |
| pack-priv int | |
| public IsoEra | Returns: the era applicable at this date, not nullOverrides default java. Gets the era applicable at this date. |
| pack-priv int | |
| pack-priv long | |
| pack-priv int | |
| public boolean | Returns: true if this date is in the leap weekChecks if the date is within the leap week. |
| public int | Returns: the length of the month in daysImplements java. Returns the length of the month represented by this date. |
| public int | Returns: the length of the year in days: 364 or 371Overrides default java. Returns the length of the year represented by this date. |
| pack-priv int | |
| public Symmetry010Date | minus(TemporalAmount
the amount to subtract, not null amount)Overrides default java. Returns an object of the same type as this object with an amount subtracted. |
| public Symmetry010Date | minus(long
the amount of the specified unit to subtract, may be negative amountToSubtract, TemporalUnit the unit of the amount to subtract, not null unit)Overrides default java. Returns an object of the same type as this object with the specified period subtracted. |
| pack-priv long | |
| public static Symmetry010Date | Returns: the current date using the system clock and default time-zone, not nullObtains the current |
| public static Symmetry010Date | |
| public static Symmetry010Date | |
| public static Symmetry010Date | Returns: the date in Symmetry010 calendar system, not nullthe Symmetry010 proleptic-year prolepticYear, int the Symmetry010 month-of-year, from 1 to 12 month, int the Symmetry010 day-of-month, from 1 to 30, or 1 to 31 in February, May, August, November,
or 1 to 37 in December in a Leap Year dayOfMonth)Obtains a |
| pack-priv static Symmetry010Date | Returns: the date in Symmetry010 calendar system, not nullthe epoch day to convert based on 1970-01-01 (ISO), corresponds to 1970-01-04 (Sym010) epochDay)Obtains a |
| pack-priv static Symmetry010Date | Returns: the date in Symmetry010 calendar system, not nullthe Symmetry010 proleptic-year prolepticYear, int the Symmetry010 day-of-year, from 1 to 364/371 dayOfYear)Obtains a |
| public Symmetry010Date | plus(TemporalAmount
the amount to add, not null amount)Overrides default java. Returns an object of the same type as this object with an amount added. |
| public Symmetry010Date | plus(long
the amount of the specified unit to add, may be negative amountToAdd, TemporalUnit the unit of the amount to add, not null unit)Overrides org. Overrides default java. Returns an object of the same type as this object with the specified period added. |
| public ValueRange | range(TemporalField
the field to query the range for, not null field)Overrides org. Overrides default java. Gets the range of valid values for the specified field. |
| pack-priv ValueRange | rangeAlignedWeekOfMonth()
Implements abstract org.
|
| private Object | |
| pack-priv Symmetry010Date | resolvePrevious(int newYear, int newMonth, int dayOfMonth)
Implements abstract org.
|
| private static Symmetry010Date | Returns: the resolved datethe Symmetry010 proleptic-year prolepticYear, int the Symmetry010 month, from 1 to 12 month, int the Symmetry010 day-of-month, from 1 to 30, or 1 to 31 in February, May, August, November,
or 1 to 37 in December in a Leap Year dayOfMonth)Consistency check for dates manipulations after calls to
|
| public long | toEpochDay()
Overrides default java. Converts this date to the Epoch Day. |
| public String | Returns: the string representationOverrides org. Implements java. Display the date in human-readable format. |
| public long | until(Temporal
the end date, exclusive, which is converted to a
endExclusive, TemporalUnit ChronoLocalDate in the same chronology, not nullthe unit to measure the amount in, not null unit)Implements java. Calculates the amount of time until another date in terms of the specified unit. |
| public ChronoPeriod | until(ChronoLocalDate
the end date, exclusive, which may be in any chronology, not null endDateExclusive)Implements java. Calculates the period between this date and another date as a |
| pack-priv long | |
| public Symmetry010Date | with(TemporalAdjuster
the adjuster to use, not null adjuster)Overrides default java. Returns an adjusted object of the same type as this object with the adjustment made. |
| public Symmetry010Date | with(TemporalField
the field to set in the result, not null field, long the new value of the field in the result newValue)Overrides org. Overrides default java. Returns an object of the same type as this object with the specified field altered. |
| pack-priv Symmetry010Date | |
| pack-priv long | Returns: The number of years from this date to the given day.The end date. end)Get the number of years from this date to the given day. |
| day | back to summary |
|---|---|
| private final int day The day of the month. | |
| dayOfMonthOffset | back to summary |
|---|---|
| private static final int[] dayOfMonthOffset Each 1st month of a quarter (month % 3 == 1) starts on a Monday, offset is 0. Each 2nd month of a quarter (month % 3 == 2) starts on a Wednesday, offset is 2. Each 3rd month of a quarter (month % 3 == 0) starts on a Saturday, offset is 5. | |
| dayOfYear | back to summary |
|---|---|
| private final transient int dayOfYear The day of year. | |
| month | back to summary |
|---|---|
| private final int month The month of the year. | |
| prolepticYear | back to summary |
|---|---|
| private final int prolepticYear The proleptic year. | |
| serialVersionUID | back to summary |
|---|---|
| private static final long serialVersionUID Serialization version. | |
| Symmetry010Date | back to summary |
|---|---|
| private Symmetry010Date(int prolepticYear, int month, int dayOfMonth) Creates an instance from validated data.
| |
| atTime | back to summary |
|---|---|
| public ChronoLocalDateTime Overrides default java. Doc from java. Combines this date with a time to create a
This returns a
| |
| create | back to summary |
|---|---|
| pack-priv static Symmetry010Date create(int prolepticYear, int month, int dayOfMonth) Factory method, validates the given triplet year, month and dayOfMonth.
| |
| from | back to summary |
|---|---|
| public static Symmetry010Date from(TemporalAccessor temporal) Hides java. Obtains a
This obtains a date in the Symmetry010 calendar system based on the specified temporal.
A
The conversion typically uses the
This method matches the signature of the functional interface
| |
| getChronology | back to summary |
|---|---|
| public Symmetry010Chronology getChronology() Implements java. Gets the chronology of this date, which is the Symmetry010 calendar system.
The
| |
| getDayOfMonth | back to summary |
|---|---|
| pack-priv int getDayOfMonth() Implements abstract org.
| |
| getDayOfMonthOffset | back to summary |
|---|---|
| private int getDayOfMonthOffset() | |
| getDayOfWeek | back to summary |
|---|---|
| pack-priv int getDayOfWeek() Overrides org.
| |
| getDayOfYear | back to summary |
|---|---|
| pack-priv int getDayOfYear() Implements abstract org.
| |
| getEra | back to summary |
|---|---|
| public IsoEra getEra() Overrides default java. Gets the era applicable at this date.
The Symmetry454 calendar system uses | |
| getMonth | back to summary |
|---|---|
| pack-priv int getMonth() Implements abstract org.
| |
| getProlepticWeek | back to summary |
|---|---|
| pack-priv long getProlepticWeek() | |
| getProlepticYear | back to summary |
|---|---|
| pack-priv int getProlepticYear() Implements abstract org.
| |
| isLeapWeek | back to summary |
|---|---|
| public boolean isLeapWeek() Checks if the date is within the leap week.
| |
| lengthOfMonth | back to summary |
|---|---|
| public int lengthOfMonth() Implements java. Returns the length of the month represented by this date. This returns the length of the month in days. Month lengths do not match those of the ISO calendar system. Most months have 30 days, except for February, May, August, November each have 31 days. December in a leap year has 37 days.
| |
| lengthOfYear | back to summary |
|---|---|
| public int lengthOfYear() Overrides default java. Returns the length of the year represented by this date. This returns the length of the year in days. Year lengths do NOT match those of the ISO calendar system.
| |
| lengthOfYearInMonths | back to summary |
|---|---|
| pack-priv int lengthOfYearInMonths() Overrides org.
| |
| minus | back to summary |
|---|---|
| public Symmetry010Date minus(TemporalAmount amount) Overrides default java. Doc from java. Returns an object of the same type as this object with an amount subtracted.
This adjusts this temporal, subtracting according to the rules of the specified amount.
The amount is typically a Some example code indicating how and why this method is used: date = date.minus(period); // subtract a Period instance date = date.minus(duration); // subtract a Duration instance date = date.minus(workingDays(6)); // example user-written workingDays method
Note that calling
| |
| minus | back to summary |
|---|---|
| public Symmetry010Date minus(long amountToSubtract, TemporalUnit unit) Overrides default java. Doc from java. Returns an object of the same type as this object with the specified period subtracted.
This method returns a new object based on this one with the specified period subtracted.
For example, on a In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st March, then subtracting one month would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.
| |
| monthsUntil | back to summary |
|---|---|
| pack-priv long monthsUntil(AbstractDate end) Overrides org.
| |
| now | back to summary |
|---|---|
| public static Symmetry010Date now() Obtains the current
This will query the Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
| |
| now | back to summary |
|---|---|
| public static Symmetry010Date now(ZoneId zone) Obtains the current
This will query the Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
| |
| now | back to summary |
|---|---|
| public static Symmetry010Date now(Clock clock) Obtains the current This will query the specified clock to obtain the current date - today. Using this method allows the use of an alternate clock for testing. The alternate clock may be introduced using dependency injection.
| |
| of | back to summary |
|---|---|
| public static Symmetry010Date of(int prolepticYear, int month, int dayOfMonth) Obtains a
This returns a
| |
| ofEpochDay | back to summary |
|---|---|
| pack-priv static Symmetry010Date ofEpochDay(long epochDay) Obtains a
| |
| ofYearDay | back to summary |
|---|---|
| pack-priv static Symmetry010Date ofYearDay(int prolepticYear, int dayOfYear) Obtains a
This returns a
| |
| plus | back to summary |
|---|---|
| public Symmetry010Date plus(TemporalAmount amount) Overrides default java. Doc from java. Returns an object of the same type as this object with an amount added.
This adjusts this temporal, adding according to the rules of the specified amount.
The amount is typically a Some example code indicating how and why this method is used: date = date.plus(period); // add a Period instance date = date.plus(duration); // add a Duration instance date = date.plus(workingDays(6)); // example user-written workingDays method
Note that calling
| |
| plus | back to summary |
|---|---|
| public Symmetry010Date plus(long amountToAdd, TemporalUnit unit) Overrides org. Overrides default java. Doc from java. Returns an object of the same type as this object with the specified period added.
This method returns a new object based on this one with the specified period added.
For example, on a In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st January, then adding one month would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.
| |
| range | back to summary |
|---|---|
| public ValueRange range(TemporalField field) Overrides org. Overrides default java. Doc from java. Gets the range of valid values for the specified field.
All fields can be expressed as a Note that the result only describes the minimum and maximum valid values and it is important not to read too much into them. For example, there could be values within the range that are invalid for the field.
| |
| rangeAlignedWeekOfMonth | back to summary |
|---|---|
| pack-priv ValueRange rangeAlignedWeekOfMonth() Implements abstract org.
| |
| readResolve | back to summary |
|---|---|
| private Object readResolve() Validates the object.
| |
| resolvePrevious | back to summary |
|---|---|
| pack-priv Symmetry010Date resolvePrevious(int newYear, int newMonth, int dayOfMonth) Implements abstract org.
| |
| resolvePreviousValid | back to summary |
|---|---|
| private static Symmetry010Date resolvePreviousValid(int prolepticYear, int month, int dayOfMonth) Consistency check for dates manipulations after calls to
| |
| toEpochDay | back to summary |
|---|---|
| public long toEpochDay() Overrides default java. Doc from java. Converts this date to the Epoch Day.
The
This default implementation queries the
| |
| toString | back to summary |
|---|---|
| public String toString() Overrides org. Implements java. Display the date in human-readable format. | |
| until | back to summary |
|---|---|
| public long until(Temporal endExclusive, TemporalUnit unit) Implements java. Doc from java. Calculates the amount of time until another date in terms of the specified unit.
This calculates the amount of time between two
There are two equivalent ways of using this method.
The first is to invoke this method.
The second is to use // these two lines are equivalent amount = start.until(end, MONTHS); amount = MONTHS.between(start, end);The choice should be made based on which makes the code more readable.
The calculation is implemented in this method for
If the unit is not a This instance is immutable and unaffected by this method call.
| |
| until | back to summary |
|---|---|
| public ChronoPeriod until(ChronoLocalDate endDateExclusive) Implements java. Doc from java. Calculates the period between this date and another date as a
This calculates the period between two dates. All supplied chronologies
calculate the period using years, months and days, however the
The start and end points are The calculation is performed using the chronology of this date. If necessary, the input date will be converted to match. This instance is immutable and unaffected by this method call.
| |
| weeksUntil | back to summary |
|---|---|
| pack-priv long weeksUntil(AbstractDate end) Overrides org.
| |
| with | back to summary |
|---|---|
| public Symmetry010Date with(TemporalAdjuster adjuster) Overrides default java. Doc from java. Returns an adjusted object of the same type as this object with the adjustment made.
This adjusts this date-time according to the rules of the specified adjuster.
A simple adjuster might simply set the one of the fields, such as the year field.
A more complex adjuster might set the date to the last day of the month.
A selection of common adjustments is provided in
Some example code indicating how and why this method is used: date = date.with(Month.JULY); // most key classes implement TemporalAdjuster date = date.with(lastDayOfMonth()); // static import from Adjusters date = date.with(next(WEDNESDAY)); // static import from Adjusters and DayOfWeek
| |
| with | back to summary |
|---|---|
| public Symmetry010Date with(TemporalField field, long newValue) Overrides org. Overrides default java. Doc from java. Returns an object of the same type as this object with the specified field altered.
This returns a new object based on this one with the value for the specified field changed.
For example, on a In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st January, then changing the month to February would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.
| |
| withDayOfYear | back to summary |
|---|---|
| pack-priv Symmetry010Date withDayOfYear(int value) Overrides org.
| |
| yearsUntil | back to summary |
|---|---|
| pack-priv long yearsUntil(Symmetry010Date end) Get the number of years from this date to the given day.
| |