com.dautelle.physics
Class Area

java.lang.Object
  java.lang.Number
      com.dautelle.math.numbers.RealtimeNumber
          com.dautelle.physics.Quantity
              com.dautelle.physics.Area

All Implemented Interfaces:

java.lang.Comparable, Operable, Realtime, Representable, java.io.Serializable

public class Area

extends Quantity

This class represents the extent of a planar region or of the surface of a solid measured in square units. The system unit for this quantity is "m²".

Version:

4.1, February 10, 2003

Author:

Jean-Marie Dautelle

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class com.dautelle.physics.Quantity

Quantity.Factory, Quantity.Value

Field Summary

static Area

ZERO Represents an Area amounting to nothing.

Constructor Summary

protected

Area() Default constructor (allows for derivation).

Method Summary

static Area	areaOf(Quantity quantity) Returns the Area corresponding to the specified quantity.
static Area	circleOf(Length radius, Angle theta) Returns the area of a circle sector (slice of a circle).
static void	showAs(Unit unit) Shows Area instances in the specified unit.

Methods inherited from class com.dautelle.physics.Quantity

abs, add, appendTo, approxEquals, approxEquals, compareTo, divide, divide, doubleValue, doubleValue, equals, floatValue, floatValue, getAbsoluteError, getMaximum, getMinimum, getOutputUnit, getRelativeError, getSystemUnit, hashCode, intValue, intValue, inverse, isPossiblyZero, longValue, longValue, multiply, multiply, negate, opposite, plus, pow, random, reciprocal, root, subtract, times, toString, toString, toXml, valueOf, valueOf, valueOf, valueOf

Methods inherited from class com.dautelle.math.numbers.RealtimeNumber

clone, export, isLocalObject, isPoolObject, pow, recycle, toHeap

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

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

Field Detail

ZERO

public static final Area ZERO

Represents an Area amounting to nothing.

Constructor Detail

Area

protected Area()

Default constructor (allows for derivation).

Method Detail

areaOf

public static Area areaOf(Quantity quantity)

Returns the Area corresponding to the specified quantity.

Parameters:

quantity - a quantity compatible with Area.

Returns:

the specified quantity or a new Area instance.

Throws:

ConversionException - if the current model does not allow the specified quantity to be converted to Area.

showAs

public static void showAs(Unit unit)

Shows Area instances in the specified unit.

Parameters:

unit - the output unit for Area instances.

See Also:

Quantity.getOutputUnit()

circleOf

public static Area circleOf(Length radius,
                            Angle theta)

Returns the area of a circle sector (slice of a circle).

Parameters:

radius - the circle radius.

theta - the central angle.

Returns:

the area of the specified circle sector.