DateTime

java.lang.Object
- java.lang.Number
- - gnu.math.Numeric
  - - gnu.math.Quantity
    - - gnu.math.DateTime

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable
```
public class DateTime
extends Quantity
implements java.lang.Cloneable
```
Represents a date and/or time. Similar functionality as java.util.Calendar (and uses GregorianCalendar internally) but supports arithmetic. Can be for XML Schema date/time types, specifically as used in XPath/Xquery..

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`DATE_MASK`
`static int`	`DAY_MASK`
`static java.util.TimeZone`	`GMT`
`static int`	`HOURS_MASK`
`static int`	`MINUTES_MASK`
`static int`	`MONTH_MASK`
`static int`	`SECONDS_MASK`
`static int`	`TIME_MASK`
`static int`	`TIMEZONE_MASK`
`static int`	`YEAR_MASK`

Fields inherited from class gnu.math.Numeric
CEILING, FLOOR, NONNEG_MOD, ROUND, TRUNCATE

Constructor Summary

Constructors
Constructor and Description

DateTime(int mask)

DateTime(int mask, java.util.GregorianCalendar calendar)

Constructors
Constructor and Description
`DateTime(int mask)`
`DateTime(int mask, java.util.GregorianCalendar calendar)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static DateTime`	`add(DateTime x, Duration y, int k)`
`Numeric`	`add(java.lang.Object y, int k)` Return this + k * obj.
`static DateTime`	`addMinutes(DateTime x, int y)`
`Numeric`	`addReversed(Numeric x, int k)` Calculate `x+k&this`.
`static DateTime`	`addSeconds(DateTime x, int y)`
`DateTime`	`adjustTimezone(int newOffset)`
`DateTime`	`cast(int newComponents)`
`static int`	`compare(DateTime date1, DateTime date2)` Return -1, 0, or 1, depending on which value is greater.
`int`	`compare(java.lang.Object obj)` Return an integer for which of `this` or `obj` is larger.
`int`	`components()`
`static int`	`daysInMonth(int month, int year)`
`int`	`getDay()`
`int`	`getHours()`
`int`	`getMinutes()`
`int`	`getMonth()`
`int`	`getNanoSecondsOnly()`
`int`	`getSecondsOnly()`
`int`	`getWholeSeconds()`
`int`	`getYear()`
`int`	`getZoneMinutes()`
`boolean`	`isExact()`
`static boolean`	`isLeapYear(int year)`
`boolean`	`isZero()`
`boolean`	`isZoneUnspecified()`
`static java.util.TimeZone`	`minutesToTimeZone(int minutes)` Get a TimeZone object for a given offset.
`Complex`	`number()`
`static DateTime`	`parse(java.lang.String value, int mask)`
`void`	`setTimeZone(java.util.TimeZone timeZone)`
`static Duration`	`sub(DateTime date1, DateTime date2)`
`java.lang.String`	`toString()`
`void`	`toString(java.lang.StringBuffer sbuf)`
`void`	`toStringDate(java.lang.StringBuffer sbuf)`
`void`	`toStringTime(java.lang.StringBuffer sbuf)`
`static void`	`toStringZone(int minutes, java.lang.StringBuffer sbuf)`
`void`	`toStringZone(java.lang.StringBuffer sbuf)`
`Unit`	`unit()`
`DateTime`	`withZoneUnspecified()`

Methods inherited from class gnu.math.Quantity
abs, add, compare, compareReversed, dimensions, div, divide, divReversed, doubleImagValue, doubleJmagValue, doubleKmagValue, doubleValue, im, imValue, jm, jmValue, km, kmValue, make, make, make, mul, mulReversed, neg, re, reValue, times, toString

Methods inherited from class gnu.math.Numeric
add, asNumericOrNull, div_inv, equals, floatValue, geq, grt, intValue, longValue, mul_ident, power, sub, toExact, toInexact

Methods inherited from class java.lang.Number
byteValue, shortValue

Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail
- YEAR_MASK
```
public static final int YEAR_MASK
```
  See Also:
  
  Constant Field Values
- MONTH_MASK
```
public static final int MONTH_MASK
```
  See Also:
  
  Constant Field Values
- DAY_MASK
```
public static final int DAY_MASK
```
  See Also:
  
  Constant Field Values
- HOURS_MASK
```
public static final int HOURS_MASK
```
  See Also:
  
  Constant Field Values
- MINUTES_MASK
```
public static final int MINUTES_MASK
```
  See Also:
  
  Constant Field Values
- SECONDS_MASK
```
public static final int SECONDS_MASK
```
  See Also:
  
  Constant Field Values
- TIMEZONE_MASK
```
public static final int TIMEZONE_MASK
```
  See Also:
  
  Constant Field Values
- DATE_MASK
```
public static final int DATE_MASK
```
  See Also:
  
  Constant Field Values
- TIME_MASK
```
public static final int TIME_MASK
```
  See Also:
  
  Constant Field Values
- GMT
```
public static java.util.TimeZone GMT
```

Constructor Detail

DateTime
```
public DateTime(int mask)
```

DateTime

public DateTime(int mask,
                java.util.GregorianCalendar calendar)

Method Detail

components
```
public int components()
```

cast

public DateTime cast(int newComponents)

parse

public static DateTime parse(java.lang.String value,
                             int mask)

isLeapYear

public static boolean isLeapYear(int year)

daysInMonth

public static int daysInMonth(int month,
                              int year)

getYear
```
public int getYear()
```

getMonth
```
public int getMonth()
```

getDay
```
public int getDay()
```

getHours
```
public int getHours()
```

getMinutes
```
public int getMinutes()
```

getSecondsOnly
```
public int getSecondsOnly()
```

getWholeSeconds
```
public int getWholeSeconds()
```

getNanoSecondsOnly
```
public int getNanoSecondsOnly()
```

compare

public static int compare(DateTime date1,
                          DateTime date2)

Return -1, 0, or 1, depending on which value is greater.

compare
```
public int compare(java.lang.Object obj)
```
Description copied from class: Numeric

Return an integer for which of this or obj is larger. Return 1 if this>obj; 0 if this==obj; -1 if this<obj; -2 if this!=obj otherwise (for example if either is NaN); -3 if not comparable (incompatible types).

Overrides:

compare in class Quantity

sub

public static Duration sub(DateTime date1,
                           DateTime date2)

withZoneUnspecified
```
public DateTime withZoneUnspecified()
```

adjustTimezone

public DateTime adjustTimezone(int newOffset)

add

public static DateTime add(DateTime x,
                           Duration y,
                           int k)

addMinutes

public static DateTime addMinutes(DateTime x,
                                  int y)

addSeconds

public static DateTime addSeconds(DateTime x,
                                  int y)

add
```
public Numeric add(java.lang.Object y,
                   int k)
```
Description copied from class: Numeric

Return this + k * obj.

Overrides:

add in class Quantity

addReversed
```
public Numeric addReversed(Numeric x,
                           int k)
```
Description copied from class: Numeric

Calculate x+k&this.

Overrides:

addReversed in class Quantity

toStringDate

public void toStringDate(java.lang.StringBuffer sbuf)

toStringTime

public void toStringTime(java.lang.StringBuffer sbuf)

isZoneUnspecified
```
public boolean isZoneUnspecified()
```

getZoneMinutes
```
public int getZoneMinutes()
```

minutesToTimeZone
```
public static java.util.TimeZone minutesToTimeZone(int minutes)
```
Get a TimeZone object for a given offset.

Parameters:

minutes - timezone offset in minutes.

setTimeZone

public void setTimeZone(java.util.TimeZone timeZone)

toStringZone

public void toStringZone(java.lang.StringBuffer sbuf)

toStringZone

public static void toStringZone(int minutes,
                                java.lang.StringBuffer sbuf)

toString

public void toString(java.lang.StringBuffer sbuf)

toString
```
public java.lang.String toString()
```
Overrides:

toString in class Numeric

isExact
```
public boolean isExact()
```
Specified by:

isExact in class Numeric

isZero
```
public boolean isZero()
```
Specified by:

isZero in class Numeric

unit
```
public Unit unit()
```
Overrides:

unit in class Quantity

number
```
public Complex number()
```
Specified by:

number in class Quantity

Class DateTime

Field Summary

Fields inherited from class gnu.math.Numeric

Constructor Summary

Method Summary

Methods inherited from class gnu.math.Quantity

Methods inherited from class gnu.math.Numeric

Methods inherited from class java.lang.Number

Methods inherited from class java.lang.Object

Field Detail

YEAR_MASK

MONTH_MASK

DAY_MASK

HOURS_MASK

MINUTES_MASK

SECONDS_MASK

TIMEZONE_MASK

DATE_MASK

TIME_MASK

GMT

Constructor Detail

DateTime

DateTime

Method Detail

components

cast

parse

isLeapYear

daysInMonth

getYear

getMonth

getDay

getHours

getMinutes

getSecondsOnly

getWholeSeconds

getNanoSecondsOnly

compare

compare

sub

withZoneUnspecified

adjustTimezone

add

addMinutes

addSeconds

add

addReversed

toStringDate

toStringTime

isZoneUnspecified

getZoneMinutes

minutesToTimeZone

setTimeZone

toStringZone

toStringZone

toString

toString

isExact

isZero

unit

number