There are quite a few different conventions for binary datetime, depending on different platforms and protocols. Some of these have severe drawbacks. For example, people using Unix time (seconds since Jan 1, 1970, usually in a 32-bit integer) think that they are safe until near the year 2038. But cases can and do arise where arithmetic manipulations causes serious problems. Consider the computation of the average of two datetimes, for example: if one calculates them with averageTime = (time1 + time2)/2, there will be overflow even with dates beginning in 2004. Moreover, even if these problems don't occur, there is the issue of conversion back and forth between different systems.

Binary datetimes differ in a number of ways: the datatype, the unit, and the epoch (origin). We refer to these as time scales.

ICU implements a universal time scale that is similar to the .NET framework's System.DateTime. The universal time scale is a 64-bit integer that holds ticks since midnight, January 1st, 0001. (One tick is 100 nanoseconds.) Negative values are supported. This has enough range to guarantee that calculations involving dates around the present are safe.

The universal time scale always measures time according to the proleptic Gregorian calendar. That is, the Gregorian calendar's leap year rules are used for all times, even before 1582 when it was introduced. (This is different from the default ICU calendar which switches from the Julian to the Gregorian calendar in 1582. See GregorianCalendar.setGregorianChange() and ucal_setGregorianChange().) ICU provides conversion functions to and from all other major time scales, allowing datetimes in any time scale to be converted to the universal time scale, safely manipulated, and converted back to any other datetime time scale.

For more details and background, see the Universal Time Scale chapter in the ICU User Guide.

Nested and Inner Type Summary

Modifier and Type	Class and Description
private static class	UniversalTimeScale.TimeScaleData This class holds the data that describes a particular time scale.

Field Summary

Modifier and Type	Field and Description
private static final long	days
public static final int	DB2_TIME Used in DB2.
public static final int	DOTNET_DATE_TIME Used in the .NET framework's `System.DateTime` structure.
public static final int	EPOCH_OFFSET_MINUS_1_VALUE The constant used to select the epoch offset minus one value for a time scale.
public static final int	EPOCH_OFFSET_PLUS_1_VALUE The constant used to select the epoch plus one value for a time scale.
public static final int	EPOCH_OFFSET_VALUE The constant used to select the epoch offset value for a time scale.
public static final int	EXCEL_TIME Used in Excel.
public static final int	FROM_MAX_VALUE The constant used to select the maximum from value for a time scale.
public static final int	FROM_MIN_VALUE The constant used to select the minimum from value for a time scale.
private static final long	hours
public static final int	ICU4C_TIME Used in the ICU4C.
public static final int	JAVA_TIME Used in the JDK.
public static final int	MAC_OLD_TIME Used in older Macintosh systems.
public static final int	MAC_TIME Used in the JDK.
public static final int	MAX_ROUND_VALUE The constant used to select the maximum safe rounding value for a time scale.
public static final int	MAX_SCALE This is the first unused time scale value.
public static final int	MAX_SCALE_VALUE The number of time scale values.
private static final long	microseconds
private static final long	milliseconds
public static final int	MIN_ROUND_VALUE The constant used to select the minimum safe rounding value for a time scale.
private static final long	minutes
private static final long	seconds
private static final long	ticks
private static final UniversalTimeScale.TimeScaleData[]	timeScaleTable
public static final int	TO_MAX_VALUE The constant used to select the maximum to value for a time scale.
public static final int	TO_MIN_VALUE The constant used to select the minimum to value for a time scale.
public static final int	UNITS_ROUND_VALUE The constant used to select the units round value for a time scale.
public static final int	UNITS_VALUE The constant used to select the units value for a time scale.
public static final int	UNIX_MICROSECONDS_TIME Data is a `long`.
public static final int	UNIX_TIME Used in Unix systems.
public static final int	WINDOWS_FILE_TIME Used in Windows for file times.

Constructor Summary

Access	Constructor and Description
private	UniversalTimeScale()

Method Summary

Modifier and Type	Method and Description
public static BigDecimal	Returns: The datetime converted to the universal time scale bigDecimalFrom(double The `double` datetime otherTime, int The time scale to convert from timeScale) Convert a `double` datetime from the given time scale to the universal time scale.
public static BigDecimal	Returns: The datetime converted to the universal time scale bigDecimalFrom(long The `long` datetime otherTime, int The time scale to convert from timeScale) Convert a `long` datetime from the given time scale to the universal time scale.
public static BigDecimal	Returns: The datetime converted to the universal time scale bigDecimalFrom(BigDecimal The `BigDecimal` datetime otherTime, int The time scale to convert from timeScale) Convert a `BigDecimal` datetime from the given time scale to the universal time scale.
public static long	Returns: The datetime converted to the universal time scale from(long The `long` datetime otherTime, int The time scale to convert from timeScale) Convert a `long` datetime from the given time scale to the universal time scale.
private static UniversalTimeScale.TimeScaleData	fromRangeCheck(long otherTime, int scale)
private static UniversalTimeScale.TimeScaleData	Returns: the `TimeScaleData` object for the given time scale getTimeScaleData(int - the time scale scale) Return the `TimeScaleData` object for the given time scale.
public static long	Returns: - the value. getTimeScaleValue(int - the time scale scale, int - a constant representing the value to get value) Get a value associated with a particular time scale.
public static BigDecimal	Returns: The datetime converted to the given time scale toBigDecimal(long The datetime in the universal time scale universalTime, int The time scale to convert to timeScale) Convert a datetime from the universal time scale to a `BigDecimal` in the given time scale.
public static BigDecimal	Returns: The datetime converted to the given time scale toBigDecimal(BigDecimal The datetime in the universal time scale universalTime, int The time scale to convert to timeScale) Convert a datetime from the universal time scale to a `BigDecimal` in the given time scale.
public static BigDecimal	Returns: the time in the given time scale toBigDecimalTrunc(BigDecimal the time in the Universal Time scale universalTime, int the time scale to convert to timeScale) Deprecated This API is ICU internal only. Convert a time in the Universal Time Scale into another time scale.
public static long	Returns: The datetime converted to the given time scale toLong(long The datetime in the universal time scale universalTime, int The time scale to convert to timeScale) Convert a datetime from the universal time scale stored as a `BigDecimal` to a `long` in the given time scale.
private static UniversalTimeScale.TimeScaleData	toRangeCheck(long universalTime, int scale)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

days	back to summary
private static final long days

DB2_TIME back to summary

DB2_TIME	back to summary
public static final int DB2_TIME Used in DB2. Data is a `?unknown?`. Value is days since December 31, 1899. ICU Status Stable since ICU 3.2.

public static final int DB2_TIME

Used in DB2. Data is a ?unknown?. Value is days since December 31, 1899.

ICU Status: Stable since ICU 3.2.

DOTNET_DATE_TIME back to summary

DOTNET_DATE_TIME	back to summary
public static final int DOTNET_DATE_TIME Used in the .NET framework's `System.DateTime` structure. Data is a `long`. Value is ticks (1 tick == 100 nanoseconds) since January 1, 0001. ICU Status Stable since ICU 3.2.

public static final int DOTNET_DATE_TIME

Used in the .NET framework's System.DateTime structure. Data is a long. Value is ticks (1 tick == 100 nanoseconds) since January 1, 0001.

ICU Status: Stable since ICU 3.2.

EPOCH_OFFSET_MINUS_1_VALUE	back to summary
public static final int EPOCH_OFFSET_MINUS_1_VALUE Deprecated This API is ICU internal only. The constant used to select the epoch offset minus one value for a time scale. Note This is an internal value. DO NOT USE IT. May not actually be equal to the epoch offset value minus one. Annotations @Deprecated ICU Status Internal ICU component. See Also `getTimeScaleValue`

EPOCH_OFFSET_PLUS_1_VALUE back to summary

EPOCH_OFFSET_PLUS_1_VALUE	back to summary
public static final int EPOCH_OFFSET_PLUS_1_VALUE The constant used to select the epoch plus one value for a time scale. Note This is an internal value. DO NOT USE IT. May not actually be equal to the epoch offset value plus one. ICU Status Stable since ICU 3.2. See Also `getTimeScaleValue`

public static final int EPOCH_OFFSET_PLUS_1_VALUE

The constant used to select the epoch plus one value for a time scale.

Note

This is an internal value. DO NOT USE IT. May not actually be equal to the epoch offset value plus one.

ICU Status: Stable since ICU 3.2.
See Also: getTimeScaleValue

EPOCH_OFFSET_VALUE back to summary

EPOCH_OFFSET_VALUE	back to summary
public static final int EPOCH_OFFSET_VALUE The constant used to select the epoch offset value for a time scale. ICU Status Stable since ICU 3.2. See Also `getTimeScaleValue`

public static final int EPOCH_OFFSET_VALUE

The constant used to select the epoch offset value for a time scale.

ICU Status: Stable since ICU 3.2.
See Also: getTimeScaleValue

EXCEL_TIME back to summary

EXCEL_TIME	back to summary
public static final int EXCEL_TIME Used in Excel. Data is a `?unknown?`. Value is days since December 31, 1899. ICU Status Stable since ICU 3.2.

public static final int EXCEL_TIME

Used in Excel. Data is a ?unknown?. Value is days since December 31, 1899.

ICU Status: Stable since ICU 3.2.

FROM_MAX_VALUE back to summary

FROM_MAX_VALUE	back to summary
public static final int FROM_MAX_VALUE The constant used to select the maximum from value for a time scale. ICU Status Stable since ICU 3.2. See Also `getTimeScaleValue`

public static final int FROM_MAX_VALUE

The constant used to select the maximum from value for a time scale.

ICU Status: Stable since ICU 3.2.
See Also: getTimeScaleValue

FROM_MIN_VALUE back to summary

FROM_MIN_VALUE	back to summary
public static final int FROM_MIN_VALUE The constant used to select the minimum from value for a time scale. ICU Status Stable since ICU 3.2. See Also `getTimeScaleValue`

public static final int FROM_MIN_VALUE

The constant used to select the minimum from value for a time scale.

ICU Status: Stable since ICU 3.2.
See Also: getTimeScaleValue

hours	back to summary
private static final long hours

ICU4C_TIME back to summary

ICU4C_TIME	back to summary
public static final int ICU4C_TIME Used in the ICU4C. Data is a `double`. Value is milliseconds since January 1, 1970. ICU Status Stable since ICU 3.2.

public static final int ICU4C_TIME

Used in the ICU4C. Data is a double. Value is milliseconds since January 1, 1970.

ICU Status: Stable since ICU 3.2.

JAVA_TIME back to summary

JAVA_TIME	back to summary
public static final int JAVA_TIME Used in the JDK. Data is a `long`. Value is milliseconds since January 1, 1970. ICU Status Stable since ICU 3.2.

public static final int JAVA_TIME

Used in the JDK. Data is a long. Value is milliseconds since January 1, 1970.

ICU Status: Stable since ICU 3.2.

MAC_OLD_TIME back to summary

MAC_OLD_TIME	back to summary
public static final int MAC_OLD_TIME Used in older Macintosh systems. Data is an `int`. Value is seconds since January 1, 1904. ICU Status Stable since ICU 3.2.

public static final int MAC_OLD_TIME

Used in older Macintosh systems. Data is an int. Value is seconds since January 1, 1904.

ICU Status: Stable since ICU 3.2.

MAC_TIME back to summary

MAC_TIME	back to summary
public static final int MAC_TIME Used in the JDK. Data is a `double`. Value is milliseconds since January 1, 2001. ICU Status Stable since ICU 3.2.

public static final int MAC_TIME

Used in the JDK. Data is a double. Value is milliseconds since January 1, 2001.

ICU Status: Stable since ICU 3.2.

MAX_ROUND_VALUE	back to summary
public static final int MAX_ROUND_VALUE Deprecated This API is ICU internal only. The constant used to select the maximum safe rounding value for a time scale. Note This is an internal value. DO NOT USE IT. Annotations @Deprecated ICU Status Internal ICU component. See Also `getTimeScaleValue`

MAX_SCALE	back to summary
public static final int MAX_SCALE Deprecated ICU 59 This is the first unused time scale value. Annotations @Deprecated

MAX_SCALE_VALUE	back to summary
public static final int MAX_SCALE_VALUE Deprecated This API is ICU internal only. The number of time scale values. Note This is an internal value. DO NOT USE IT. Annotations @Deprecated ICU Status Internal ICU component. See Also `getTimeScaleValue`

microseconds	back to summary
private static final long microseconds

milliseconds	back to summary
private static final long milliseconds

MIN_ROUND_VALUE	back to summary
public static final int MIN_ROUND_VALUE Deprecated This API is ICU internal only. The constant used to select the minimum safe rounding value for a time scale. Note This is an internal value. DO NOT USE IT. Annotations @Deprecated ICU Status Internal ICU component. See Also `getTimeScaleValue`

minutes	back to summary
private static final long minutes

seconds	back to summary
private static final long seconds

ticks	back to summary
private static final long ticks

timeScaleTable	back to summary
private static final UniversalTimeScale.TimeScaleData[] timeScaleTable

TO_MAX_VALUE back to summary

TO_MAX_VALUE	back to summary
public static final int TO_MAX_VALUE The constant used to select the maximum to value for a time scale. ICU Status Stable since ICU 3.2. See Also `getTimeScaleValue`

public static final int TO_MAX_VALUE

The constant used to select the maximum to value for a time scale.

ICU Status: Stable since ICU 3.2.
See Also: getTimeScaleValue

TO_MIN_VALUE back to summary

TO_MIN_VALUE	back to summary
public static final int TO_MIN_VALUE The constant used to select the minimum to value for a time scale. ICU Status Stable since ICU 3.2. See Also `getTimeScaleValue`

public static final int TO_MIN_VALUE

The constant used to select the minimum to value for a time scale.

ICU Status: Stable since ICU 3.2.
See Also: getTimeScaleValue

UNITS_ROUND_VALUE	back to summary
public static final int UNITS_ROUND_VALUE Deprecated This API is ICU internal only. The constant used to select the units round value for a time scale. Note This is an internal value. DO NOT USE IT. Annotations @Deprecated ICU Status Internal ICU component. See Also `getTimeScaleValue`

UNITS_VALUE	back to summary
public static final int UNITS_VALUE The constant used to select the units value for a time scale. ICU Status Stable since ICU 3.2.

UNITS_VALUE

back to summary

public static final int UNITS_VALUE

The constant used to select the units value for a time scale.

ICU Status: Stable since ICU 3.2.

UNIX_MICROSECONDS_TIME back to summary

UNIX_MICROSECONDS_TIME	back to summary
public static final int UNIX_MICROSECONDS_TIME Data is a `long`. Value is microseconds since January 1, 1970. Similar to Unix time (linear value from 1970) and struct timeval (microseconds resolution). ICU Status Stable since ICU 3.8.

public static final int UNIX_MICROSECONDS_TIME

Data is a long. Value is microseconds since January 1, 1970. Similar to Unix time (linear value from 1970) and struct timeval (microseconds resolution).

ICU Status: Stable since ICU 3.8.

UNIX_TIME back to summary

UNIX_TIME	back to summary
public static final int UNIX_TIME Used in Unix systems. Data is an `int` or a `long`. Value is seconds since January 1, 1970. ICU Status Stable since ICU 3.2.

public static final int UNIX_TIME

Used in Unix systems. Data is an int or a long. Value is seconds since January 1, 1970.

ICU Status: Stable since ICU 3.2.

WINDOWS_FILE_TIME back to summary

WINDOWS_FILE_TIME	back to summary
public static final int WINDOWS_FILE_TIME Used in Windows for file times. Data is a `long`. Value is ticks (1 tick == 100 nanoseconds) since January 1, 1601. ICU Status Stable since ICU 3.2.

public static final int WINDOWS_FILE_TIME

Used in Windows for file times. Data is a long. Value is ticks (1 tick == 100 nanoseconds) since January 1, 1601.

ICU Status: Stable since ICU 3.2.

Constructor Detail

UniversalTimeScale	back to summary
private UniversalTimeScale()

Method Detail

bigDecimalFrom back to summary

bigDecimalFrom	back to summary
public static BigDecimal bigDecimalFrom(double otherTime, int timeScale) Convert a `double` datetime from the given time scale to the universal time scale. All calculations are done using `BigDecimal` to guarantee that the value does not go out of range. Parameters otherTime:double The `double` datetime timeScale:int The time scale to convert from Returns:BigDecimal The datetime converted to the universal time scale ICU Status Stable since ICU 3.2.

public static BigDecimal bigDecimalFrom(double otherTime, int timeScale)

Convert a double datetime from the given time scale to the universal time scale. All calculations are done using BigDecimal to guarantee that the value does not go out of range.

Parameters

otherTime:double: The double datetime
timeScale:int: The time scale to convert from

Returns:BigDecimal

The datetime converted to the universal time scale

ICU Status

Stable since ICU 3.2.

bigDecimalFrom back to summary

bigDecimalFrom	back to summary
public static BigDecimal bigDecimalFrom(long otherTime, int timeScale) Convert a `long` datetime from the given time scale to the universal time scale. All calculations are done using `BigDecimal` to guarantee that the value does not go out of range. Parameters otherTime:long The `long` datetime timeScale:int The time scale to convert from Returns:BigDecimal The datetime converted to the universal time scale ICU Status Stable since ICU 3.2.

public static BigDecimal bigDecimalFrom(long otherTime, int timeScale)

Convert a long datetime from the given time scale to the universal time scale. All calculations are done using BigDecimal to guarantee that the value does not go out of range.

Parameters

otherTime:long: The long datetime
timeScale:int: The time scale to convert from

Returns:BigDecimal

The datetime converted to the universal time scale

ICU Status

Stable since ICU 3.2.

bigDecimalFrom back to summary

bigDecimalFrom	back to summary
public static BigDecimal bigDecimalFrom(BigDecimal otherTime, int timeScale) Convert a `BigDecimal` datetime from the given time scale to the universal time scale. All calculations are done using `BigDecimal` to guarantee that the value does not go out of range. Parameters otherTime:BigDecimal The `BigDecimal` datetime timeScale:int The time scale to convert from Returns:BigDecimal The datetime converted to the universal time scale ICU Status Stable since ICU 3.2.

public static BigDecimal bigDecimalFrom(BigDecimal otherTime, int timeScale)

Convert a BigDecimal datetime from the given time scale to the universal time scale. All calculations are done using BigDecimal to guarantee that the value does not go out of range.

Parameters

otherTime:BigDecimal: The BigDecimal datetime
timeScale:int: The time scale to convert from

Returns:BigDecimal

The datetime converted to the universal time scale

ICU Status

Stable since ICU 3.2.

from back to summary

from	back to summary
public static long from(long otherTime, int timeScale) Convert a `long` datetime from the given time scale to the universal time scale. Parameters otherTime:long The `long` datetime timeScale:int The time scale to convert from Returns:long The datetime converted to the universal time scale ICU Status Stable since ICU 3.2.

public static long from(long otherTime, int timeScale)

Convert a long datetime from the given time scale to the universal time scale.

Parameters

otherTime:long: The long datetime
timeScale:int: The time scale to convert from

Returns:long

The datetime converted to the universal time scale

ICU Status

Stable since ICU 3.2.

fromRangeCheck	back to summary
private static UniversalTimeScale.TimeScaleData fromRangeCheck(long otherTime, int scale)

getTimeScaleData back to summary

getTimeScaleData	back to summary
private static UniversalTimeScale.TimeScaleData getTimeScaleData(int scale) Return the `TimeScaleData` object for the given time scale. Parameters scale:int - the time scale Returns:UniversalTimeScale.TimeScaleData the `TimeScaleData` object for the given time scale

private static UniversalTimeScale.TimeScaleData getTimeScaleData(int scale)

Return the TimeScaleData object for the given time scale.

Parameters

scale:int: - the time scale

Returns:UniversalTimeScale.TimeScaleData

the TimeScaleData object for the given time scale

getTimeScaleValue	back to summary
public static long getTimeScaleValue(int scale, int value) Get a value associated with a particular time scale. Parameters scale:int - the time scale value:int - a constant representing the value to get Returns:long - the value. ICU Status Stable since ICU 3.2.

getTimeScaleValue

back to summary

public static long getTimeScaleValue(int scale, int value)

Get a value associated with a particular time scale.

Parameters

scale:int: - the time scale
value:int: - a constant representing the value to get

Returns:long

- the value.

ICU Status

Stable since ICU 3.2.

toBigDecimal back to summary

toBigDecimal	back to summary
public static BigDecimal toBigDecimal(long universalTime, int timeScale) Convert a datetime from the universal time scale to a `BigDecimal` in the given time scale. Parameters universalTime:long The datetime in the universal time scale timeScale:int The time scale to convert to Returns:BigDecimal The datetime converted to the given time scale ICU Status Stable since ICU 3.2.

public static BigDecimal toBigDecimal(long universalTime, int timeScale)

Convert a datetime from the universal time scale to a BigDecimal in the given time scale.

Parameters

universalTime:long: The datetime in the universal time scale
timeScale:int: The time scale to convert to

Returns:BigDecimal

The datetime converted to the given time scale

ICU Status

Stable since ICU 3.2.

toBigDecimal back to summary

toBigDecimal	back to summary
public static BigDecimal toBigDecimal(BigDecimal universalTime, int timeScale) Convert a datetime from the universal time scale to a `BigDecimal` in the given time scale. Parameters universalTime:BigDecimal The datetime in the universal time scale timeScale:int The time scale to convert to Returns:BigDecimal The datetime converted to the given time scale ICU Status Stable since ICU 3.2.

public static BigDecimal toBigDecimal(BigDecimal universalTime, int timeScale)

Convert a datetime from the universal time scale to a BigDecimal in the given time scale.

Parameters

universalTime:BigDecimal: The datetime in the universal time scale
timeScale:int: The time scale to convert to

Returns:BigDecimal

The datetime converted to the given time scale

ICU Status

Stable since ICU 3.2.

toBigDecimalTrunc	back to summary
public static BigDecimal toBigDecimalTrunc(BigDecimal universalTime, int timeScale) Deprecated This API is ICU internal only. Convert a time in the Universal Time Scale into another time scale. The division used to do the conversion rounds down. Note This is an internal routine used by the tool that generates the to and from limits. Use it at your own risk. Parameters universalTime:BigDecimal the time in the Universal Time scale timeScale:int the time scale to convert to Returns:BigDecimal the time in the given time scale Annotations @Deprecated ICU Status Internal ICU component.

toBigDecimalTrunc

back to summary

public static BigDecimal toBigDecimalTrunc(BigDecimal universalTime, int timeScale)

Deprecated

This API is ICU internal only.

Convert a time in the Universal Time Scale into another time scale. The division used to do the conversion rounds down.

Note

This is an internal routine used by the tool that generates the to and from limits. Use it at your own risk.

Parameters

universalTime:BigDecimal: the time in the Universal Time scale
timeScale:int: the time scale to convert to

Returns:BigDecimal

the time in the given time scale

Annotations

@Deprecated

ICU Status

Internal ICU component.

toLong back to summary

toLong	back to summary
public static long toLong(long universalTime, int timeScale) Convert a datetime from the universal time scale stored as a `BigDecimal` to a `long` in the given time scale. Since this calculation requires a divide, we must round. The straight forward way to round by adding half of the divisor will push the sum out of range for values within have the divisor of the limits of the precision of a `long`. To get around this, we do the rounding like this: `(universalTime - units + units/2) / units + 1` (i.e. we subtract units first to guarantee that we'll still be in range when we add `units/2`. We then need to add one to the quotent to make up for the extra subtraction. This simplifies to: `(universalTime - units/2) / units - 1` For negative values to round away from zero, we need to flip the signs: `(universalTime + units/2) / units + 1` Since we also need to subtract the epochOffset, we fold the `+/- 1` into the offset value. (i.e. `epochOffsetP1`, `epochOffsetM1`.) Parameters universalTime:long The datetime in the universal time scale timeScale:int The time scale to convert to Returns:long The datetime converted to the given time scale ICU Status Stable since ICU 3.2.

public static long toLong(long universalTime, int timeScale)

Convert a datetime from the universal time scale stored as a BigDecimal to a long in the given time scale. Since this calculation requires a divide, we must round. The straight forward way to round by adding half of the divisor will push the sum out of range for values within have the divisor of the limits of the precision of a long. To get around this, we do the rounding like this:

(universalTime - units + units/2) / units + 1

(i.e. we subtract units first to guarantee that we'll still be in range when we add units/2. We then need to add one to the quotent to make up for the extra subtraction. This simplifies to:

(universalTime - units/2) / units - 1

For negative values to round away from zero, we need to flip the signs:

(universalTime + units/2) / units + 1

Since we also need to subtract the epochOffset, we fold the +/- 1 into the offset value. (i.e. epochOffsetP1, epochOffsetM1.)

Parameters

universalTime:long: The datetime in the universal time scale
timeScale:int: The time scale to convert to

Returns:long

The datetime converted to the given time scale

ICU Status

Stable since ICU 3.2.

toRangeCheck	back to summary
private static UniversalTimeScale.TimeScaleData toRangeCheck(long universalTime, int scale)

com.ibm.icu.util back to summary

private final Class UniversalTimeScale.TimeScaleData

Class Inheritance

extends Object

java.lang.Object
com.ibm.icu.util.UniversalTimeScale.TimeScaleData

This class holds the data that describes a particular time scale.

Field Summary

Modifier and Type	Field and Description
pack-priv long	epochOffset
pack-priv long	epochOffsetM1
pack-priv long	epochOffsetP1
pack-priv long	fromMax
pack-priv long	fromMin
pack-priv long	maxRound
pack-priv long	minRound
pack-priv long	toMax
pack-priv long	toMin
pack-priv long	units
pack-priv long	unitsRound

Constructor Summary

Access	Constructor and Description
pack-priv	TimeScaleData(long theUnits, long theEpochOffset, long theToMin, long theToMax, long theFromMin, long theFromMax)

Method Summary

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

epochOffset	back to summary
pack-priv long epochOffset

epochOffsetM1	back to summary
pack-priv long epochOffsetM1

epochOffsetP1	back to summary
pack-priv long epochOffsetP1

fromMax	back to summary
pack-priv long fromMax

fromMin	back to summary
pack-priv long fromMin

maxRound	back to summary
pack-priv long maxRound

minRound	back to summary
pack-priv long minRound

toMax	back to summary
pack-priv long toMax

toMin	back to summary
pack-priv long toMin

units	back to summary
pack-priv long units

unitsRound	back to summary
pack-priv long unitsRound

Constructor Detail

TimeScaleData	back to summary
pack-priv TimeScaleData(long theUnits, long theEpochOffset, long theToMin, long theToMax, long theFromMin, long theFromMax)

public final Class UniversalTimeScale

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Class UniversalTimeScale.TimeScaleData

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail