Package gnu.math

Class Unit

java.lang.Object

java.lang.Number

gnu.math.Numeric

gnu.math.Quantity

gnu.math.Unit

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

NamedUnit

public abstract class Unit
extends Quantity

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final Unit	cm
static final NamedUnit	date
static final Unit	degree
static final BaseUnit	duration
static BaseUnit	Empty
static final Unit	gradian
static final BaseUnit	gram
static final Unit	hour
static final Unit	in
static final BaseUnit	meter
static final Unit	minute
static final Unit	mm
static final NamedUnit	month
static double	NON_COMBINABLE	A magic factor to indicate units that have the same "dimension" but not a fixed multiple.
static final Unit	pica
static final Unit	pt
static final Unit	radian
static final NamedUnit	second

Fields inherited from class gnu.math.Numeric

CEILING, FLOOR, NONNEG_MOD, ROUND, TRUNCATE

Method Summary

Modifier and Type	Method	Description
static Unit	define(String name, double factor, Unit base)
static Unit	define(String name, DQuantity value)
final Dimensions	dimensions()
static Unit	divide(Unit unit1, Unit unit2)
final double	doubleValue()	The value of the real component, as a double.
String	getName()
int	hashCode()
boolean	isExact()
final boolean	isZero()
static NamedUnit	lookup(String name)
static NamedUnit	make(String name, Quantity value)
Complex	number()
static Unit	pow(Unit unit, int power)
Numeric	power(IntNum y)	Return this raised to an integer power.
Unit	sqrt()
static Unit	times(Unit unit1, Unit unit2)
String	toString()
String	toString(double val)
String	toString(RealNum val)
Unit	unit()

Methods inherited from class gnu.math.Quantity

abs, add, add, addReversed, compare, compare, compareReversed, div, divide, divReversed, doubleImagValue, doubleJmagValue, doubleKmagValue, 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, sub, toExact, toInexact

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

Empty

public static BaseUnit Empty

NON_COMBINABLE

public static double NON_COMBINABLE

A magic factor to indicate units that have the same "dimension" but not a fixed multiple. E.g. "month" and "day", or money of different currencies. Since they have the same dimension, they can be added to get an (unimplemented) combined quantity, but they cannot be compared. No general support yet, but used for time Duration.

meter

public static final BaseUnit meter

duration

public static final BaseUnit duration

gram

public static final BaseUnit gram

cm

public static final Unit cm

mm

public static final Unit mm

in

public static final Unit in

pt

public static final Unit pt

pica

public static final Unit pica

radian

public static final Unit radian

degree

public static final Unit degree

gradian

public static final Unit gradian

date

public static final NamedUnit date

second

public static final NamedUnit second

month

public static final NamedUnit month

minute

public static final Unit minute

hour

public static final Unit hour

Method Details

dimensions

public final Dimensions dimensions()

Overrides:

dimensions in class Quantity

doubleValue

public final double doubleValue()

Description copied from class: Quantity

The value of the real component, as a double. This is relative to the unit().dims - i.e. unit()/doubleValue() is factored in.

Overrides:

doubleValue in class Quantity

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getName

public String getName()

times

public static Unit times(Unit unit1,
 Unit unit2)

divide

public static Unit divide(Unit unit1,
 Unit unit2)

pow

public static Unit pow(Unit unit,
 int power)

make

public static NamedUnit make(String name,
 Quantity value)

define

public static Unit define(String name,
 DQuantity value)

define

public static Unit define(String name,
 double factor,
 Unit base)

number

public Complex number()

Specified by:

number in class Quantity

isExact

public boolean isExact()

Specified by:

isExact in class Numeric

isZero

public final boolean isZero()

Specified by:

isZero in class Numeric

power

public Numeric power(IntNum y)

Description copied from class: Numeric

Return this raised to an integer power. Implemented by repeated squaring and multiplication. If y < 0, returns div_inv of the result.

Overrides:

power in class Numeric

sqrt

public Unit sqrt()

lookup

public static NamedUnit lookup(String name)

toString

public String toString(double val)

toString

public String toString(RealNum val)

toString

public String toString()

Overrides:

toString in class Numeric

unit

public Unit unit()

Overrides:

unit in class Quantity