Package javax.measure

Interface Quantity<Q extends Quantity<Q>>

Type Parameters:
Q - The type of the quantity.
All Known Subinterfaces:
Acceleration, AmountOfSubstance, Angle, Area, CatalyticActivity, Dimensionless, ElectricCapacitance, ElectricCharge, ElectricConductance, ElectricCurrent, ElectricInductance, ElectricPotential, ElectricResistance, Energy, Force, Frequency, Illuminance, Length, LuminousFlux, LuminousIntensity, MagneticFlux, MagneticFluxDensity, Mass, Power, Pressure, RadiationDoseAbsorbed, RadiationDoseEffective, Radioactivity, SolidAngle, Speed, Temperature, Time, Volume
public interface Quantity<Q extends Quantity<Q>>
Represents a quantitative property of a phenomenon, body, or substance, that can be quantified by measurement. Mass, time, distance, heat, and angular separation are among the familiar examples of quantitative properties.

Unit<Mass> pound = ... Quantity<Length> size = ... Sensor<Temperature>
thermometer = ... Vector3D<Speed> aircraftSpeed = ...

Since:
1.0
Version:
1.0, August 8, 2016
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    Quantity<Q>
    add(Quantity<Q> augend)
    Returns the sum of this Quantity with the one specified.
    <T extends Quantity<T>>
    Quantity<T>
    asType(Class<T> type)
    Casts this quantity to a parameterized unit of specified nature or throw a ClassCastException if the dimension of the specified quantity and this measure unit's dimension do not match.
    Quantity<Q>
    divide(Number divisor)
    Returns the product of this Quantity divided by the Number specified.
    Quantity<?>
    divide(Quantity<?> divisor)
    Returns the product of this Quantity divided by the Quantity specified.
    Unit<Q>
    getUnit()
    Returns the unit of this Quantity.
    Number
    getValue()
    Returns the value of this Quantity.
    Quantity<?>
    inverse()
    Returns a Quantity whose unit is unit.inverse().
    Quantity<Q>
    multiply(Number multiplier)
    Returns the product of this Quantity with the Number value specified.
    Quantity<?>
    multiply(Quantity<?> multiplier)
    Returns the product of this Quantity with the one specified.
    Quantity<Q>
    subtract(Quantity<Q> subtrahend)
    Returns the difference between this Quantity and the one specified.
    Quantity<Q>
    to(Unit<Q> unit)
    Returns this Quantity converted into another (compatible) Unit.

  • Method Details

    • add

      Quantity<Q> add(Quantity<Q> augend)
      Returns the sum of this Quantity with the one specified.
      Parameters:
      augend - the Quantity to be added.
      Returns:
      this + augend.

    • subtract

      Quantity<Q> subtract(Quantity<Q> subtrahend)
      Returns the difference between this Quantity and the one specified.
      Parameters:
      subtrahend - the Quantity to be subtracted.
      Returns:
      this - that.

    • divide

      Quantity<?> divide(Quantity<?> divisor)
      Returns the product of this Quantity divided by the Quantity specified.
      Parameters:
      divisor - the Quantity divisor.
      Returns:
      this / that.
      Throws:
      ClassCastException - if the type of an element in the specified operation is incompatible with this quantity (optional)

    • divide

      Quantity<Q> divide(Number divisor)
      Returns the product of this Quantity divided by the Number specified.
      Parameters:
      divisor - the Number divisor.
      Returns:
      this / that.

    • multiply

      Quantity<?> multiply(Quantity<?> multiplier)
      Returns the product of this Quantity with the one specified.
      Parameters:
      multiplier - the Quantity multiplier.
      Returns:
      this * multiplier.
      Throws:
      ClassCastException - if the type of an element in the specified operation is incompatible with this quantity (optional)

    • multiply

      Quantity<Q> multiply(Number multiplier)
      Returns the product of this Quantity with the Number value specified.
      Parameters:
      multiplier - the Number multiplier.
      Returns:
      this * multiplier.

    • inverse

      Quantity<?> inverse()
      Returns a Quantity whose unit is unit.inverse().
      Returns:
      Quantity with this.getUnit().inverse().

    • to

      Quantity<Q> to(Unit<Q> unit)
      Returns this Quantity converted into another (compatible) Unit.
      Parameters:
      unit - the Unit to convert to.
      Returns:
      the converted result.

    • asType

      <T extends Quantity<T>> Quantity<T> asType(Class<T> type) throws ClassCastException
      Casts this quantity to a parameterized unit of specified nature or throw a ClassCastException if the dimension of the specified quantity and this measure unit's dimension do not match. For example:

      Quantity<Length> length = Quantities.getQuantity("2 km").asType(Length.class); or Quantity<Speed> C = length.multiply(299792458).divide(second).asType(Speed.class);

      Type Parameters:
      T - The type of the quantity.
      Parameters:
      type - the quantity class identifying the nature of the quantity.
      Returns:
      this quantity parameterized with the specified type.
      Throws:
      ClassCastException - if the dimension of this unit is different from the specified quantity dimension.
      UnsupportedOperationException - if the specified quantity class does not have a SI unit for the quantity.
      See Also:

    • getValue

      Number getValue()
      Returns the value of this Quantity.
      Returns:
      a value.

    • getUnit

      Unit<Q> getUnit()
      Returns the unit of this Quantity.
      Returns:
      the unit (shall not be null).