org.jscience.physics.quantities
Class Duration

java.lang.Object
  javolution.realtime.RealtimeObject
      org.jscience.mathematics.numbers.Number<Quantity>
          org.jscience.physics.quantities.Quantity
              org.jscience.physics.quantities.Duration

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<Quantity>, Realtime, Operable<Quantity>, Numeric<Quantity>

public class Duration
extends Quantity

This class represents a period of existence or persistence. The system unit for this quantity is "s" (Système International d'Unités).

Version:

1.0, October 24, 2004

Author:

Jean-Marie Dautelle

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.jscience.physics.quantities.Quantity

Quantity.Factory<Q extends Quantity>

Nested classes/interfaces inherited from interface javolution.realtime.Realtime

Realtime.ObjectSpace

Field Summary

static Duration

ZERO Represents a Duration amounting to nothing.

Constructor Summary

protected

Duration() Default constructor (allows for derivation).

Method Summary

java.util.Date	addTo(java.util.Date date) Returns the date after the specified date.
static Duration	between(java.util.Date from, java.util.Date to) Returns the Duration from the ellapsed time between two dates.
static void	showAs(Unit unit) Shows Duration instances in the specified unit.
java.util.Date	subtractFrom(java.util.Date date) Returns the date before the specified date.

Methods inherited from class org.jscience.physics.quantities.Quantity

approxEquals, compareTo, divide, doubleValue, equals, getAbsoluteError, getAmount, getMaximum, getMinimum, getRelativeError, getUnit, hashCode, isLargerThan, longValue, minus, norm, opposite, plus, rangeOf, reciprocal, root, sqrt, times, times, to, toText, valueOf, valueOf, valueOf

Methods inherited from class org.jscience.mathematics.numbers.Number

abs, byteValue, divide, floatValue, intValue, inverse, isGreaterThan, isLessThan, pow, shortValue

Methods inherited from class javolution.realtime.RealtimeObject

export, move, moveHeap, preserve, recycle, toString, unpreserve

Methods inherited from class java.lang.Object

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

Methods inherited from interface javolution.realtime.Realtime

move

Field Detail

ZERO

public static final Duration ZERO

Represents a Duration amounting to nothing.

Constructor Detail

Duration

protected Duration()

Default constructor (allows for derivation).

Method Detail

showAs

public static void showAs(Unit unit)

Shows Duration instances in the specified unit.

Parameters:

unit - the display unit for Duration instances.

between

public static Duration between(java.util.Date from,
                               java.util.Date to)

Returns the Duration from the ellapsed time between two dates.

Parameters:

from - the departure date.

to - the arrival date.

Returns:

the ellapsed time between the specified dates.

addTo

public java.util.Date addTo(java.util.Date date)

Returns the date after the specified date. How long after being specified by this Duration.

Parameters:

date - the date of origin.

Returns:

date + this.

subtractFrom

public java.util.Date subtractFrom(java.util.Date date)

Returns the date before the specified date. How long before being specified by this Duration.

Parameters:

date - the date of origin.

Returns:

date - this