javax.measure.unit.SI
|
JSR-275 - Measurements and Units Specification | ||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||
java.lang.Object
public final class SI
This class contains SI (Système International d'Unités) base units, and derived units.
It also defines the 20 SI prefixes used to form decimal multiples and
submultiples of SI units. For example:
import static org.jscience.physics.units.SI.*; // Static import.
...
Unit<Pressure> HECTO_PASCAL = HECTO(PASCAL);
Unit<Length> KILO_METER = KILO(METER);
A collection of all the SI units defined can be retrieved using the
SI.units() static method.
| Field Summary | |
|---|---|
static BaseUnit<ElectricCurrent> |
AMPERE
The base unit for electric current quantities ( A). |
static AlternateUnit<RadioactiveActivity> |
BECQUEREL
The derived unit for activity of a radionuclide ( Bq). |
static AlternateUnit<DataAmount> |
BIT
The unit for binary information ( bit). |
static BaseUnit<LuminousIntensity> |
CANDELA
The base unit for luminous intensity quantities ( cd). |
static Unit<Temperature> |
CELSIUS
The derived unit for Celsius temperature ( ℃). |
static AlternateUnit<ElectricCharge> |
COULOMB
The derived unit for electric charge, quantity of electricity ( C). |
static Unit<Volume> |
CUBIC_METER
The metric unit for volume quantities ( m³). |
static AlternateUnit<ElectricCapacitance> |
FARAD
The derived unit for capacitance ( F). |
static Unit<Mass> |
GRAM
The derived unit for mass quantities ( g). |
static AlternateUnit<RadiationDoseAbsorbed> |
GRAY
The derived unit for absorbed dose, specific energy (imparted), kerma ( Gy). |
static AlternateUnit<ElectricInductance> |
HENRY
The derived unit for inductance ( H). |
static AlternateUnit<Frequency> |
HERTZ
The derived unit for frequency ( Hz). |
static AlternateUnit<Energy> |
JOULE
The derived unit for energy, work, quantity of heat ( J). |
static AlternateUnit<CatalyticActivity> |
KATAL
The derived unit for catalytic activity ( kat). |
static BaseUnit<Temperature> |
KELVIN
The base unit for thermodynamic temperature quantities ( K). |
static BaseUnit<Mass> |
KILOGRAM
The base unit for mass quantities ( kg). |
static AlternateUnit<LuminousFlux> |
LUMEN
The derived unit for luminous flux ( lm). |
static AlternateUnit<Illuminance> |
LUX
The derived unit for illuminance ( lx). |
static BaseUnit<Length> |
METER
The base unit for length quantities ( m). |
static Unit<Velocity> |
METER_PER_SECOND
The metric unit for velocity quantities ( m/s). |
static Unit<Acceleration> |
METER_PER_SQUARE_SECOND
The metric unit for acceleration quantities ( m/s²). |
static BaseUnit<AmountOfSubstance> |
MOLE
The base unit for amount of substance quantities ( mol). |
static AlternateUnit<Force> |
NEWTON
The derived unit for force ( N). |
static AlternateUnit<ElectricResistance> |
OHM
The derived unit for electric resistance ( Ω or
Ohm). |
static AlternateUnit<Pressure> |
PASCAL
The derived unit for pressure, stress ( Pa). |
static AlternateUnit<Angle> |
RADIAN
The unit for plane angle quantities ( rad). |
static BaseUnit<Duration> |
SECOND
The base unit for duration quantities ( s). |
static AlternateUnit<ElectricConductance> |
SIEMENS
The derived unit for electric conductance ( S). |
static AlternateUnit<RadiationDoseEffective> |
SIEVERT
The derived unit for dose equivalent ( Sv). |
static Unit<Area> |
SQUARE_METER
The metric unit for area quantities ( m²). |
static AlternateUnit<SolidAngle> |
STERADIAN
The unit for solid angle quantities ( sr). |
static AlternateUnit<MagneticFluxDensity> |
TESLA
The derived unit for magnetic flux density ( T). |
static AlternateUnit<ElectricPotential> |
VOLT
The derived unit for electric potential difference, electromotive force ( V). |
static AlternateUnit<Power> |
WATT
The derived unit for power, radiant, flux ( W). |
static AlternateUnit<MagneticFlux> |
WEBER
The derived unit for magnetic flux ( Wb). |
| Method Summary | ||
|---|---|---|
static
|
ATTO(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-18 |
|
static
|
CENTI(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-2 |
|
static
|
DECI(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-1 |
|
static
|
DEKA(Unit<Q> unit)
Returns the specified unit multiplied by the factor 101 |
|
static
|
EXA(Unit<Q> unit)
Returns the specified unit multiplied by the factor 1018 |
|
static
|
FEMTO(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-15 |
|
static
|
GIGA(Unit<Q> unit)
Returns the specified unit multiplied by the factor 109 |
|
static
|
HECTO(Unit<Q> unit)
Returns the specified unit multiplied by the factor 102 |
|
static
|
KILO(Unit<Q> unit)
Returns the specified unit multiplied by the factor 103 |
|
static
|
MEGA(Unit<Q> unit)
Returns the specified unit multiplied by the factor 106 |
|
static
|
MICRO(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-6 |
|
static
|
MILLI(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-3 |
|
static
|
NANO(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-9 |
|
static
|
PETA(Unit<Q> unit)
Returns the specified unit multiplied by the factor 1015 |
|
static
|
PICO(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-12 |
|
static
|
TERA(Unit<Q> unit)
Returns the specified unit multiplied by the factor 1012 |
|
static java.util.Set<Unit<?>> |
units()
Returns a read only view over the SI units defined in this class. |
|
static
|
YOCTO(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-24 |
|
static
|
YOTTA(Unit<Q> unit)
Returns the specified unit multiplied by the factor 1024 |
|
static
|
ZEPTO(Unit<Q> unit)
Returns the specified unit multiplied by the factor 10-21 |
|
static
|
ZETTA(Unit<Q> unit)
Returns the specified unit multiplied by the factor 1021 |
|
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public static final BaseUnit<ElectricCurrent> AMPERE
A).
The Ampere is that constant current which, if maintained in two straight
parallel conductors of infinite length, of negligible circular
cross-section, and placed 1 metre apart in vacuum, would produce between
these conductors a force equal to 2 × 10-7 newton per metre of length.
It is named after the French physicist Andre Ampere (1775-1836).
public static final BaseUnit<LuminousIntensity> CANDELA
cd).
The candela is the luminous intensity, in a given direction,
of a source that emits monochromatic radiation of frequency
540 × 1012 hertz and that has a radiant intensity in that
direction of 1/683 watt per steradian
public static final BaseUnit<Temperature> KELVIN
K).
The kelvin is the 1/273.16th of the thermodynamic temperature of the
triple point of water. It is named after the Scottish mathematician and
physicist William Thomson 1st Lord Kelvin (1824-1907)
public static final BaseUnit<Mass> KILOGRAM
kg).
It is the only SI unit with a prefix as part of its name and symbol.
The kilogram is equal to the mass of an international prototype in the
form of a platinum-iridium cylinder kept at Sevres in France.
GRAMpublic static final BaseUnit<Length> METER
m).
One meter was redefined in 1983 as the distance traveled by light in
a vacuum in 1/299,792,458 of a second.
public static final BaseUnit<AmountOfSubstance> MOLE
mol).
The mole is the amount of substance of a system which contains as many
elementary entities as there are atoms in 0.012 kilogram of carbon 12.
public static final BaseUnit<Duration> SECOND
s).
It is defined as the duration of 9,192,631,770 cycles of radiation
corresponding to the transition between two hyperfine levels of
the ground state of cesium (1967 Standard).
public static final Unit<Mass> GRAM
g).
The base unit for mass quantity is KILOGRAM.
public static final AlternateUnit<Angle> RADIAN
rad).
One radian is the angle between two radii of a circle such that the
length of the arc between them is equal to the radius.
public static final AlternateUnit<SolidAngle> STERADIAN
sr).
One steradian is the solid angle subtended at the center of a sphere by
an area on the surface of the sphere that is equal to the radius squared.
The total solid angle of a sphere is 4*Pi steradians.
public static final AlternateUnit<DataAmount> BIT
bit).
public static final AlternateUnit<Frequency> HERTZ
Hz).
A unit of frequency equal to one cycle per second.
After Heinrich Rudolf Hertz (1857-1894), German physicist who was the
first to produce radio waves artificially.
public static final AlternateUnit<Force> NEWTON
N).
One newton is the force required to give a mass of 1 kilogram an Force
of 1 metre per second per second. It is named after the English
mathematician and physicist Sir Isaac Newton (1642-1727).
public static final AlternateUnit<Pressure> PASCAL
Pa).
One pascal is equal to one newton per square meter. It is named after
the French philosopher and mathematician Blaise Pascal (1623-1662).
public static final AlternateUnit<Energy> JOULE
J).
One joule is the amount of work done when an applied force of 1 newton
moves through a distance of 1 metre in the direction of the force.
It is named after the English physicist James Prescott Joule (1818-1889).
public static final AlternateUnit<Power> WATT
W).
One watt is equal to one joule per second. It is named after the British
scientist James Watt (1736-1819).
public static final AlternateUnit<ElectricCharge> COULOMB
C).
One Coulomb is equal to the quantity of charge transferred in one second
by a steady current of one ampere. It is named after the French physicist
Charles Augustin de Coulomb (1736-1806).
public static final AlternateUnit<ElectricPotential> VOLT
V).
One Volt is equal to the difference of electric potential between two
points on a conducting wire carrying a constant current of one ampere
when the power dissipated between the points is one watt. It is named
after the Italian physicist Count Alessandro Volta (1745-1827).
public static final AlternateUnit<ElectricCapacitance> FARAD
F).
One Farad is equal to the capacitance of a capacitor having an equal
and opposite charge of 1 coulomb on each plate and a potential difference
of 1 volt between the plates. It is named after the British physicist
and chemist Michael Faraday (1791-1867).
public static final AlternateUnit<ElectricResistance> OHM
Ω or
Ohm).
One Ohm is equal to the resistance of a conductor in which a current of
one ampere is produced by a potential of one volt across its terminals.
It is named after the German physicist Georg Simon Ohm (1789-1854).
public static final AlternateUnit<ElectricConductance> SIEMENS
S).
One Siemens is equal to one ampere per volt. It is named after
the German engineer Ernst Werner von Siemens (1816-1892).
public static final AlternateUnit<MagneticFlux> WEBER
Wb).
One Weber is equal to the magnetic flux that in linking a circuit of one
turn produces in it an electromotive force of one volt as it is uniformly
reduced to zero within one second. It is named after the German physicist
Wilhelm Eduard Weber (1804-1891).
public static final AlternateUnit<MagneticFluxDensity> TESLA
T).
One Tesla is equal equal to one weber per square meter. It is named
after the Serbian-born American electrical engineer and physicist
Nikola Tesla (1856-1943).
public static final AlternateUnit<ElectricInductance> HENRY
H).
One Henry is equal to the inductance for which an induced electromotive
force of one volt is produced when the current is varied at the rate of
one ampere per second. It is named after the American physicist
Joseph Henry (1791-1878).
public static final Unit<Temperature> CELSIUS
℃).
This is a unit of temperature such as the freezing point of water
(at one atmosphere of pressure) is 0 ℃, while the boiling point is
100 ℃.
public static final AlternateUnit<LuminousFlux> LUMEN
lm).
One Lumen is equal to the amount of light given out through a solid angle
by a source of one candela intensity radiating equally in all directions.
public static final AlternateUnit<Illuminance> LUX
lx).
One Lux is equal to one lumen per square meter.
public static final AlternateUnit<RadioactiveActivity> BECQUEREL
Bq).
One becquerel is the radiation caused by one disintegration per second.
It is named after the French physicist, Antoine-Henri Becquerel
(1852-1908).
public static final AlternateUnit<RadiationDoseAbsorbed> GRAY
Gy).
One gray is equal to the dose of one joule of energy absorbed per one
kilogram of matter. It is named after the British physician
L. H. Gray (1905-1965).
public static final AlternateUnit<RadiationDoseEffective> SIEVERT
Sv).
One Sievert is equal is equal to the actual dose, in grays, multiplied
by a "quality factor" which is larger for more dangerous forms of
radiation. It is named after the Swedish physicist Rolf Sievert
(1898-1966).
public static final AlternateUnit<CatalyticActivity> KATAL
kat).
public static final Unit<Velocity> METER_PER_SECOND
m/s).
public static final Unit<Acceleration> METER_PER_SQUARE_SECOND
m/s²).
public static final Unit<Area> SQUARE_METER
m²).
public static final Unit<Volume> CUBIC_METER
m³).
| Method Detail |
|---|
public static <Q extends Quantity> Unit<Q> YOTTA(Unit<Q> unit)
1024
unit - any unit.
unit.multiply(1e24).public static <Q extends Quantity> Unit<Q> ZETTA(Unit<Q> unit)
1021
unit - any unit.
unit.multiply(1e21).public static <Q extends Quantity> Unit<Q> EXA(Unit<Q> unit)
1018
unit - any unit.
unit.multiply(1e18).public static <Q extends Quantity> Unit<Q> PETA(Unit<Q> unit)
1015
unit - any unit.
unit.multiply(1e15).public static <Q extends Quantity> Unit<Q> TERA(Unit<Q> unit)
1012
unit - any unit.
unit.multiply(1e12).public static <Q extends Quantity> Unit<Q> GIGA(Unit<Q> unit)
109
unit - any unit.
unit.multiply(1e9).public static <Q extends Quantity> Unit<Q> MEGA(Unit<Q> unit)
106
unit - any unit.
unit.multiply(1e6).public static <Q extends Quantity> Unit<Q> KILO(Unit<Q> unit)
103
unit - any unit.
unit.multiply(1e3).public static <Q extends Quantity> Unit<Q> HECTO(Unit<Q> unit)
102
unit - any unit.
unit.multiply(1e2).public static <Q extends Quantity> Unit<Q> DEKA(Unit<Q> unit)
101
unit - any unit.
unit.multiply(1e1).public static <Q extends Quantity> Unit<Q> DECI(Unit<Q> unit)
10-1
unit - any unit.
unit.multiply(1e-1).public static <Q extends Quantity> Unit<Q> CENTI(Unit<Q> unit)
10-2
unit - any unit.
unit.multiply(1e-2).public static <Q extends Quantity> Unit<Q> MILLI(Unit<Q> unit)
10-3
unit - any unit.
unit.multiply(1e-3).public static <Q extends Quantity> Unit<Q> MICRO(Unit<Q> unit)
10-6
unit - any unit.
unit.multiply(1e-6).public static <Q extends Quantity> Unit<Q> NANO(Unit<Q> unit)
10-9
unit - any unit.
unit.multiply(1e-9).public static <Q extends Quantity> Unit<Q> PICO(Unit<Q> unit)
10-12
unit - any unit.
unit.multiply(1e-12).public static <Q extends Quantity> Unit<Q> FEMTO(Unit<Q> unit)
10-15
unit - any unit.
unit.multiply(1e-15).public static <Q extends Quantity> Unit<Q> ATTO(Unit<Q> unit)
10-18
unit - any unit.
unit.multiply(1e-18).public static <Q extends Quantity> Unit<Q> ZEPTO(Unit<Q> unit)
10-21
unit - any unit.
unit.multiply(1e-21).public static <Q extends Quantity> Unit<Q> YOCTO(Unit<Q> unit)
10-24
unit - any unit.
unit.multiply(1e-24).public static java.util.Set<Unit<?>> units()
|
JSR-275 - Measurements and Units Specification | ||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||