See: Description
Interface  Description 

Acceleration 
Rate of change of speed with respect to time.

Action 
Energy multiplied by a duration (quantity associated to the
Planck Constant).

AmountOfSubstance 
Number of elementary entities (molecules, for example) of a substance.

Angle 
Figure formed by two lines diverging from a common point.

AngularAcceleration 
Rate of change of angular speed with respect to time.

AngularSpeed 
Rate of change of angular displacement with respect to time.

AngularVelocity  Deprecated
Renamed
AngularSpeed , because speed is a scalar value while velocity is a vector. 
Area 
Extent of a planar region or of the surface of a solid measured in square units.

CatalyticActivity 
Catalytic activity.

Dimensionless 
Quantity for which all exponents of the dimensions corresponding to the base units are zero.

DynamicViscosity 
Dynamic viscosity.

ElectricCapacitance 
Electric capacitance.

ElectricCharge 
Electric charge.

ElectricConductance 
Electric conductance.

ElectricCurrent 
Amount of electric charge flowing past a specified circuit point per unit time.

ElectricInductance 
Electric inductance.

ElectricPermittivity 
How an electric field affects, and is affected, by a dielectric medium.

ElectricPotential 
Electric potential or electromotive force.

ElectricResistance 
Electric resistance.

Energy 
Capacity of a physical system to do work.

Force 
Quantity that tends to produce an acceleration of a body in the direction of its application.

Frequency 
Number of times a specified phenomenon occurs within a specified interval.

Illuminance 
Illuminance.

Information 
Measure of information.

InformationRate 
Speed of datatransmission.

IonizingRadiation 
Quantity of subatomic particles or electromagnetic waves that are energetic
enough to detach electrons from atoms or molecules, ionizing them.

KinematicViscosity 
Diffusion of momentum.

Length 
Extent of something along its greatest dimension
or the extent of space between two objects or places.

Luminance 
Luminous intensity per unit area of light traveling in a given direction.

LuminousFlux 
Luminous flux.

LuminousIntensity 
Luminous flux density per solid angle
as measured in a given direction relative to the emitting source.

MagneticFieldStrength 
Magnetic field strength.

MagneticFlux 
Magnetic flux.

MagneticFluxDensity 
Magnetic flux density.

MagneticPermeability 
Degree of magnetization of a material that responds linearly
to an applied magnetic field.

MagnetomotiveForce 
Force that produces magnetic flux.

Mass 
Measure of the quantity of matter that a body or an object contains.

MassFlowRate 
Movement of mass per time.

Power 
Rate at which work is done.

Pressure 
Force applied uniformly over a surface.

Quantity<Q extends Quantity<Q>> 
Property of a phenomenon, body, or substance, where the property has a magnitude
that can be expressed as a number and a unit (adapted from
VIM).

RadiationDoseAbsorbed 
Amount of energy deposited per unit of mass.

RadiationDoseEffective 
Effective (or "equivalent") dose of radiation
received by a human or some other living organism.

RadioactiveActivity  Deprecated
Renamed
Radioactivity . 
Radioactivity 
Radioactive activity.

SolidAngle 
Angle formed by three or more planes intersecting at a common point.

Speed 
Distance traveled divided by the time of travel.

Temperature 
Degree of hotness or coldness of a body or an environment.

Time 
Period of existence or persistence.

Torque 
Moment of a force.

Velocity  Deprecated
Renamed
Speed , because speed is a scalar value while velocity is a vector. 
Volume 
Amount of space occupied by a threedimensional object or region of space.

VolumetricDensity 
Mass per unit volume of a substance under specified conditions
of pressure and temperature.

VolumetricFlowRate 
Volume of fluid passing a point in a system per unit of time.

WaveNumber 
This interface represents a wave property inversely related to wavelength.

Quantity
interface.
This package provides subtypes for the quantities defined in the
International System of Units
(SI), together with a few nonSI quantities. Users can create their own quantity types by extending the
Quantity
interface.
This package supports measurable quantities, which can be expressed
as (Number
, Unit
) tuples.
Those tuples are not expected to be used directly in numerically intensive code.
They are more useful as metadata converted to the application internal representation
(for example double
primitive type with the requirement to provide values in metres)
before computation begins.
Quantities subtypes are also used as parameterized type to characterize
generic classes and provide additional compile time check. This technic is
used extensively by the Unit
interface,
but users can apply the same approach to their own classes. In the example
below, Sensor
and Vector3D
are userdefined classes:
// A generalpurpose Sensor class used for temperature measurements:
Sensor<Temperature> sensor ...;
Temperature temp = sensor.getValue();
// Velocity vector (a vector of speeds) in a threedimensional space.
Unit<Speed> = metrePerSecond = METRE.divide(SECOND);
Vector3D<Speed> aircraftSpeed = new Vector3D(200.0, 50.0, 0.5, metrePerSecond);
Definition of terms
Quantity
,
International vocabulary of metrologyCopyright © 2005–2014 Units of Measurement project. All rights reserved.