Unit (udunits 4.5.1 API)

All Known Subinterfaces:

DerivedUnit

All Known Implementing Classes:

BaseUnit, DerivedUnitImpl, LogarithmicUnit, OffsetUnit, ScaledUnit, TimeScaleUnit, UnitImpl, UnknownUnit
```
public interface Unit
```
Interface for units.

Version:

$Id: Unit.java 64 2006-07-12 22:30:50Z edavis $

Author:

Steven R. Emmerson

Method Summary

Methods
Modifier and Type	Method and Description
`Unit`	`clone(UnitName id)` Clones this unit, changing the identifier.
`double[]`	`convertTo(double[] amounts, Unit outputUnit)` Converts numerical values from this unit to another unit.
`double[]`	`convertTo(double[] input, Unit outputUnit, double[] output)` Converts numerical values from this unit to another unit.
`double`	`convertTo(double amount, Unit outputUnit)` Converts a numerical value from this unit to another unit.
`float[]`	`convertTo(float[] amounts, Unit outputUnit)` Converts numerical values from this unit to another unit.
`float[]`	`convertTo(float[] input, Unit outputUnit, float[] output)` Converts numerical values from this unit to another unit.
`float`	`convertTo(float amount, Unit outputUnit)` Converts a numerical value from this unit to another unit.
`Unit`	`divideBy(Unit that)` Divides this unit by another.
`Unit`	`divideInto(Unit that)` Divides this unit into another.
`boolean`	`equals(Object object)` Indicates if this unit is semantically identical to an object.
`String`	`getCanonicalString()` Returns the canonical string representation of the unit.
`Converter`	`getConverterTo(Unit outputUnit)` Gets a Converter that converts numeric values from this unit to another, compatible unit.
`DerivedUnit`	`getDerivedUnit()` Returns the derived unit that underlies this unit.
`String`	`getName()` Gets the name of this unit.
`String`	`getPlural()` Gets the plural form of the name of this unit.
`String`	`getSymbol()` Gets the symbol of this unit.
`UnitName`	`getUnitName()` Gets the identifier of this unit.
`boolean`	`isCompatible(Unit that)` Indicates if this unit is compatible with another unit.
`boolean`	`isDimensionless()` Indicates if values in this unit are dimensionless.
`Unit`	`log(double base)` Returns a logarithmic unit whose reference level is equal to this unit.
`String`	`makeLabel(String quantityID)` Makes a label for a named quantity.
`Unit`	`multiplyBy(double scale)` Multiplies this unit by a scale factor.
`Unit`	`multiplyBy(Unit that)` Multiplies this unit by another.
`Unit`	`raiseTo(int power)` Raises this unit to a power.
`Unit`	`shiftTo(Date origin)` Returns a unit identical to this instance but whose origin (i.e., zero value) has been shifted to the given time.
`Unit`	`shiftTo(double origin)` Returns a unit identical to this instance but whose origin (i.e., zero value) has been shifted to the given value.
`String`	`toString()` Returns the string representation of the unit.

- Method Detail
  - getUnitName
```
UnitName getUnitName()
```
    Gets the identifier of this unit.
    
    Returns:
    The identifier of this unit. May be null.
  - getName
```
String getName()
```
    Gets the name of this unit.
    
    Returns:
    The name of this unit. May be null.
  - getPlural
```
String getPlural()
```
    Gets the plural form of the name of this unit.
    
    Returns:
    The plural of the name of this unit. May be null.
  - getSymbol
```
String getSymbol()
```
    Gets the symbol of this unit.
    
    Returns:
    The symbol for this unit. May be null.
  - toString
```
String toString()
```
    Returns the string representation of the unit.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    The string representation of the unit
  - getCanonicalString
```
String getCanonicalString()
```
    Returns the canonical string representation of the unit.
    
    Returns:
    The canonical string representation.
  - getDerivedUnit
```
DerivedUnit getDerivedUnit()
```
    Returns the derived unit that underlies this unit.
    
    Returns:
    The derived unit that underlies this unit.
  - clone
```
Unit clone(UnitName id)
```
    Clones this unit, changing the identifier.
    
    Parameters:
    id - The identifier for the new unit.
    
    Returns:
    The new unit.
  - multiplyBy
```
Unit multiplyBy(Unit that)
                throws MultiplyException
```
    Multiplies this unit by another.
    
    Parameters:
    that - The other unit.
    
    Returns:
    The product of multiplying this unit by the other unit.
    
    Throws:
    
    MultiplyException - Can't multiply these units.
  - multiplyBy
```
Unit multiplyBy(double scale)
                throws MultiplyException
```
    Multiplies this unit by a scale factor. For example, if m is a meter unit, then m.multiplyBy(1e-2) returns a centimeter unit.
    
    Parameters:
    scale - The scale factor.
    
    Returns:
    The result of multiplying this unit by the scale factor.
    
    Throws:
    
    MultiplyException - if scale is zero.
  - divideBy
```
Unit divideBy(Unit that)
              throws OperationException
```
    Divides this unit by another.
    
    Parameters:
    that - The other unit.
    
    Returns:
    The quotient of dividing this unit by the other unit.
    
    Throws:
    
    OperationException - Can't divide these units.
  - divideInto
```
Unit divideInto(Unit that)
                throws OperationException
```
    Divides this unit into another.
    
    Parameters:
    that - The other unit.
    
    Returns:
    The quotient of dividing this unit into the other unit.
    
    Throws:
    
    OperationException - Can't divide these units.
  - raiseTo
```
Unit raiseTo(int power)
             throws RaiseException
```
    Raises this unit to a power.
    
    Parameters:
    power - The power.
    
    Returns:
    This result of raising this unit to the power.
    
    Throws:
    
    RaiseException - Can't raise this unit to a power.
  - shiftTo
```
Unit shiftTo(double origin)
             throws ShiftException
```
    Returns a unit identical to this instance but whose origin (i.e., zero value) has been shifted to the given value. For example, if degK is a Kelvin unit, then degK.shiftTo(273.15) is a Celsius unit.
    
    Parameters:
    origin - The new origin in units of this instance.
    
    Returns:
    A unit convertible with this instance but whose zero value is equal to the value origin of this instance.
    
    Throws:
    
    ShiftException - if the corresponding new unit can't be created.
  - shiftTo
```
Unit shiftTo(Date origin)
             throws ShiftException
```
    Returns a unit identical to this instance but whose origin (i.e., zero value) has been shifted to the given time. For example, if sec is a second unit, then sec.shiftTo(new Date(0L) is the unit corresponding to seconds since the epoch (1970-01-01 00:00:00 UTC).
    
    Parameters:
    origin - The new origin.
    
    Returns:
    A unit whose zero value is the time given by origin.
    
    Throws:
    
    ShiftException - if the corresponding new unit can't be created. For example, if this instance isn't a unit of time.
  - log
```
Unit log(double base)
```
    Returns a logarithmic unit whose reference level is equal to this unit. For example, if mW is a milliwatt unit, then mW.log(10.) returns a base-ten logarithmic unit with a milliwatt reference level.
    
    Parameters:
    base - The logarithmic base. Must be one of 2, Math.E , or 10.
    
    Throws:
    
    IllegalArgumentException - if base isn't one of the allowed values.
  - getConverterTo
```
Converter getConverterTo(Unit outputUnit)
                         throws ConversionException
```
    Gets a Converter that converts numeric values from this unit to another, compatible unit.
    
    Parameters:
    outputUnit - The unit to which to convert the numerical values.
    
    Returns:
    A converter of numeric values from this unit to the other unit.
    
    Throws:
    
    ConversionException - The units aren't compatible.
  - convertTo
```
float convertTo(float amount,
              Unit outputUnit)
                throws ConversionException
```
    Converts a numerical value from this unit to another unit.
    
    Parameters:
    amount - The numerical value in this unit.
    outputUnit - The unit to which to convert the numerical value.
    
    Returns:
    The numerical value in the output unit.
    
    Throws:
    
    ConversionException - The units aren't compatible.
  - convertTo
```
double convertTo(double amount,
               Unit outputUnit)
                 throws ConversionException
```
    Converts a numerical value from this unit to another unit.
    
    Parameters:
    amount - The numerical value in this unit.
    outputUnit - The unit to which to convert the numerical value.
    
    Returns:
    The numerical value in the output unit.
    
    Throws:
    
    ConversionException - The units aren't compatible.
  - convertTo
```
float[] convertTo(float[] amounts,
                Unit outputUnit)
                  throws ConversionException
```
    Converts numerical values from this unit to another unit.
    
    Parameters:
    amounts - The numerical values in this unit.
    outputUnit - The unit to which to convert the numerical values.
    
    Returns:
    The numerical values in the output unit. in allocated space.
    
    Throws:
    
    ConversionException - The units aren't compatible.
  - convertTo
```
double[] convertTo(double[] amounts,
                 Unit outputUnit)
                   throws ConversionException
```
    Converts numerical values from this unit to another unit.
    
    Parameters:
    amounts - The numerical values in this unit.
    outputUnit - The unit to which to convert the numerical values.
    
    Returns:
    The numerical values in the output unit. in allocated space.
    
    Throws:
    
    ConversionException - The units aren't compatible.
  - convertTo
```
float[] convertTo(float[] input,
                Unit outputUnit,
                float[] output)
                  throws ConversionException
```
    Converts numerical values from this unit to another unit.
    
    Parameters:
    input - The numerical values in this unit.
    outputUnit - The unit to which to convert the numerical values.
    output - The output numerical values. May be the same array as the input values.
    
    Returns:
    output.
    
    Throws:
    
    ConversionException - The units aren't compatible.
  - convertTo
```
double[] convertTo(double[] input,
                 Unit outputUnit,
                 double[] output)
                   throws ConversionException
```
    Converts numerical values from this unit to another unit.
    
    Parameters:
    input - The numerical values in this unit.
    outputUnit - The unit to which to convert the numerical values.
    output - The output numerical values. May be the same array as the input values.
    
    Returns:
    output.
    
    Throws:
    
    ConversionException - The units aren't compatible.
  - isCompatible
```
boolean isCompatible(Unit that)
```
    Indicates if this unit is compatible with another unit.
    
    Parameters:
    that - The other unit.
    
    Returns:
    True iff values in this unit are convertible to values in the other unit.
  - equals
```
boolean equals(Object object)
```
    Indicates if this unit is semantically identical to an object.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    object - The object.
    
    Returns:
    true if and only if this unit is semantically identical to the object.
  - makeLabel
```
String makeLabel(String quantityID)
```
    Makes a label for a named quantity.
    
    Parameters:
    quantityID - An identifier of the quantity for which the label is intended (e.g. "altitude").
    
    Returns:
    A label (e.g. "altitude/km").
  - isDimensionless
```
boolean isDimensionless()
```
    Indicates if values in this unit are dimensionless.
    
    Returns:
    true if and only if this unit is dimensionless.

Interface Unit

Method Summary

Method Detail

getUnitName

getName

getPlural

getSymbol

toString

getCanonicalString

getDerivedUnit

clone

multiplyBy

multiplyBy

divideBy

divideInto

raiseTo

shiftTo

shiftTo

log

getConverterTo

convertTo

convertTo

convertTo

convertTo

convertTo

convertTo

isCompatible

equals

makeLabel

isDimensionless