Package org.djunits.quantity

Class Force

java.lang.Object

java.lang.Number

org.djunits.quantity.def.Quantity<Force>

org.djunits.quantity.Force

All Implemented Interfaces:

Serializable, Comparable<Force>, Additive<Force>, Scalable<Force>, Value<Force>

public class Force
extends Quantity<Force>

Force is an interaction that changes the motion of an object, measured in newtons (N).

Copyright (c) 2025-2026 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See for project information https://djunits.org. The DJUNITS project is distributed under a three-clause BSD-style license.

Author:

Alexander Verbraeck

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Force.Unit	Force.Unit encodes the units of force.

Field Summary

Fields

Modifier and Type	Field	Description
static final Force	NaN	Constant with value NaN.
static final Force	NEG_MAXVALUE	Constant with value -MAX_VALUE.
static final Force	NEGATIVE_INFINITY	Constant with value NEGATIVE_INFINITY.
static final Force	ONE	Constant with value one.
static final Force	POS_MAXVALUE	Constant with value MAX_VALUE.
static final Force	POSITIVE_INFINITY	Constant with value POSITIVE_INFINITY.
static final Force	ZERO	Constant with value zero.

Fields inherited from class org.djunits.quantity.def.Quantity

si

Constructor Summary

Constructors

Constructor	Description
Force(double valueInUnit, Force.Unit unit)	Instantiate a Force quantity expressed in the given unit.
Force(double value, Force.Unit displayUnit, boolean useSi)	Instantiate a Force quantity with an SI or base value and a display unit.

Method Summary

Modifier and Type	Method	Description
Mass	divide(Acceleration v)	Calculate the division of Force and Acceleration, which results in a Mass scalar.
Pressure	divide(Area v)	Calculate the division of Force and Area, which results in a Pressure scalar.
LinearObjectDensity	divide(Energy v)	Calculate the division of Force and Energy, which results in a LinearObjectDensity scalar.
Dimensionless	divide(Force v)	Calculate the division of Force and Force, which results in a Dimensionless quantity.
Energy	divide(LinearObjectDensity v)	Calculate the division of Force and LinearObjectDensity, which results in a Energy scalar.
Acceleration	divide(Mass v)	Calculate the division of Force and Mass, which results in a Acceleration scalar.
Area	divide(Pressure v)	Calculate the division of Force and Pressure, which results in a Area scalar.
Force.Unit	getDisplayUnit()	Retrieve the unit of this Value.
Force	instantiateSi(double siValue, UnitInterface<Force> displayUnit)	Instantiate a quantity with an SI or base value, and a display unit.
Energy	multiply(Length v)	Calculate the multiplication of Force and Length, which results in a Energy scalar.
Power	multiply(Speed v)	Calculate the multiplication of Force and Speed, which results in a Power scalar.
static Force	of(double valueInUnit, String unitString)	Returns a Force based on a value and the textual representation of the unit, which can be localized.
static Force	of(double valueInUnit, Force.Unit unit)	Returns a Force based on a value expressed in the unit.
static Force	ofSi(double si)	Return a Force instance based on an SI value.
static Force	ofSi(double siValue, Force.Unit displayUnit)	Instantiate a Force quantity with an SI or base value and a display unit.
static Force	valueOf(String text)	Returns a Force representation of a textual representation of a value with a unit.

Methods inherited from class org.djunits.quantity.def.Quantity

abs, add, as, compareTo, divide, doubleValue, eq, eq0, equals, floatValue, format, format, format, ge, ge0, getInUnit, getInUnit, getName, gt, gt0, hashCode, instantiate, instantiateSi, interpolate, intValue, isRelative, le, le0, longValue, lt, lt0, max, mean, min, multiply, ne, ne0, negate, of, product, reciprocal, scaleBy, si, siUnit, subtract, sum, toString, valueOf

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.djunits.value.Scalable

divideBy

Methods inherited from interface org.djunits.value.Value

isAbsolute

Field Details

ZERO

public static final Force ZERO

Constant with value zero.

ONE

public static final Force ONE

Constant with value one.

NaN

public static final Force NaN

Constant with value NaN.

POSITIVE_INFINITY

public static final Force POSITIVE_INFINITY

Constant with value POSITIVE_INFINITY.

NEGATIVE_INFINITY

public static final Force NEGATIVE_INFINITY

Constant with value NEGATIVE_INFINITY.

POS_MAXVALUE

public static final Force POS_MAXVALUE

Constant with value MAX_VALUE.

NEG_MAXVALUE

public static final Force NEG_MAXVALUE

Constant with value -MAX_VALUE.

Constructor Details

Force

public Force(double value,
 Force.Unit displayUnit,
 boolean useSi)

Instantiate a Force quantity with an SI or base value and a display unit.

Parameters:

value - the quantity value expressed in the SI or base unit

displayUnit - the display unit to use

useSi - use SI value when true, use value in unit when false

Force

public Force(double valueInUnit,
 Force.Unit unit)

Instantiate a Force quantity expressed in the given unit.

Parameters:

valueInUnit - the quantity value expressed in the given unit

unit - the unit of the value, also acts as the display unit

Method Details

ofSi

public static Force ofSi(double si)

Return a Force instance based on an SI value.

Parameters:

si - the si value

Returns:

the Force instance based on an SI value

ofSi

public static Force ofSi(double siValue,
 Force.Unit displayUnit)

Instantiate a Force quantity with an SI or base value and a display unit.

Parameters:

siValue - the quantity value expressed in the SI or base unit

displayUnit - the display unit to use

Returns:

the Force instance based on an SI value with the given display unit

instantiateSi

public Force instantiateSi(double siValue,
 UnitInterface<Force> displayUnit)

Description copied from class: Quantity

Instantiate a quantity with an SI or base value, and a display unit.

Specified by:

instantiateSi in class Quantity<Force>

Parameters:

siValue - the value expressed in the base (SI) unit

displayUnit - the display unit to use for the quantity

Returns:

a quantity with the given SI or base value, and the given display unit

valueOf

public static Force valueOf(String text)

Returns a Force representation of a textual representation of a value with a unit. The String representation that can be parsed is the double value in the unit, followed by a localized or English abbreviation of the unit. Spaces are allowed, but not required, between the value and the unit.

Parameters:

text - the textual representation to parse into a Force

Returns:

the Scalar representation of the value in its unit

Throws:

IllegalArgumentException - when the text cannot be parsed

NullPointerException - when the text argument is null

of

public static Force of(double valueInUnit,
 Force.Unit unit)

Returns a Force based on a value expressed in the unit.

Parameters:

valueInUnit - the value, expressed in the given unit

unit - the unit of the value, also acts as the display unit

Returns:

ab Force representation of the value in its unit

of

public static Force of(double valueInUnit,
 String unitString)

Returns a Force based on a value and the textual representation of the unit, which can be localized.

Parameters:

valueInUnit - the value, expressed in the unit as given by unitString

unitString - the textual representation of the unit

Returns:

the Scalar representation of the value in its unit

Throws:

IllegalArgumentException - when the unit cannot be parsed or is incorrect

NullPointerException - when the unitString argument is null

getDisplayUnit

public Force.Unit getDisplayUnit()

Description copied from interface: Value

Retrieve the unit of this Value.

Specified by:

getDisplayUnit in interface Value<Force>

Overrides:

getDisplayUnit in class Quantity<Force>

Returns:

the unit of this Value

divide

public Dimensionless divide(Force v)

Calculate the division of Force and Force, which results in a Dimensionless quantity.

Parameters:

v - quantity

Returns:

quantity as a division of Force and Force

multiply

public Energy multiply(Length v)

Calculate the multiplication of Force and Length, which results in a Energy scalar.

Parameters:

v - scalar

Returns:

scalar as a multiplication of Force and Length

divide

public Energy divide(LinearObjectDensity v)

Calculate the division of Force and LinearObjectDensity, which results in a Energy scalar.

Parameters:

v - scalar

Returns:

scalar as a division of Force and LinearObjectDensity

divide

public LinearObjectDensity divide(Energy v)

Calculate the division of Force and Energy, which results in a LinearObjectDensity scalar.

Parameters:

v - scalar

Returns:

scalar as a division of Force and Energy

multiply

public Power multiply(Speed v)

Calculate the multiplication of Force and Speed, which results in a Power scalar.

Parameters:

v - scalar

Returns:

scalar as a multiplication of Force and Speed

divide

public Acceleration divide(Mass v)

Calculate the division of Force and Mass, which results in a Acceleration scalar.

Parameters:

v - scalar

Returns:

scalar as a division of Force and Mass

divide

public Mass divide(Acceleration v)

Calculate the division of Force and Acceleration, which results in a Mass scalar.

Parameters:

v - scalar

Returns:

scalar as a division of Force and Acceleration

divide

public Pressure divide(Area v)

Calculate the division of Force and Area, which results in a Pressure scalar.

Parameters:

v - scalar

Returns:

scalar as a division of Force and Area

divide

public Area divide(Pressure v)

Calculate the division of Force and Pressure, which results in a Area scalar.

Parameters:

v - scalar

Returns:

scalar as a division of Force and Pressure