Package org.djunits.quantity

Class Force

java.lang.Object

java.lang.Number

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

org.djunits.quantity.Force

All Implemented Interfaces:

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

public class Force
extends Quantity<Force,Force.Unit>

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.

Constructor Summary

Constructors

Constructor	Description
Force(double value, String abbreviation)	Instantiate a Force quantity with a unit, expressed as a String.
Force(double value, Force.Unit unit)	Instantiate a Force quantity with a unit.
Force(Force value)	Construct Force quantity.

Method Summary

Modifier and Type	Method	Description
final Mass	divide(Acceleration v)	Calculate the division of Force and Acceleration, which results in a Mass scalar.
final Pressure	divide(Area v)	Calculate the division of Force and Area, which results in a Pressure scalar.
final LinearObjectDensity	divide(Energy v)	Calculate the division of Force and Energy, which results in a LinearObjectDensity scalar.
final Dimensionless	divide(Force v)	Calculate the division of Force and Force, which results in a Dimensionless quantity.
final Energy	divide(LinearObjectDensity v)	Calculate the division of Force and LinearObjectDensity, which results in a Energy scalar.
final Acceleration	divide(Mass v)	Calculate the division of Force and Mass, which results in a Acceleration scalar.
final Area	divide(Pressure v)	Calculate the division of Force and Pressure, which results in a Area scalar.
Force	instantiate(double si)	Instantiate a quantity with an SI or base value.
final Energy	multiply(Length v)	Calculate the multiplication of Force and Length, which results in a Energy scalar.
final Power	multiply(Speed v)	Calculate the multiplication of Force and Speed, which results in a Power scalar.
static Force	of(double value, String unitString)	Returns a Force based on a value and the textual representation of the unit, which can be localized.
static Force	ofSi(double si)	Return a Force instance based on an SI value.
SIUnit	siUnit()	Return the SI unit of this quantity.
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, ge, ge0, getDisplayUnit, getInUnit, getInUnit, getName, gt, gt0, hashCode, instantiate, interpolate, intValue, isRelative, le, le0, longValue, lt, lt0, max, mean, min, multiply, ne, ne0, negate, of, product, reciprocal, scaleBy, setDisplayUnit, si, subtract, sum, toDisplayString, toDisplayString, toString, toString, toString, toString, toStringSIPrefixed, toStringSIPrefixed, toTextualString, toTextualString, 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, setDisplayUnit

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 unit)

Instantiate a Force quantity with a unit.

Parameters:

value - the value, expressed in the unit

unit - the unit in which the value is expressed

Force

public Force(double value,
 String abbreviation)

Instantiate a Force quantity with a unit, expressed as a String.

Parameters:

value - the value, expressed in the unit

abbreviation - the String abbreviation of the unit in which the value is expressed

Force

public Force(Force value)

Construct Force quantity.

Parameters:

value - Scalar from which to construct this instance

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

instantiate

public Force instantiate(double si)

Description copied from class: Quantity

Instantiate a quantity with an SI or base value.

Specified by:

instantiate in class Quantity<Force,Force.Unit>

Parameters:

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

Returns:

a quantity with the given SI-value and base (SI) unit

siUnit

public SIUnit siUnit()

Description copied from class: Quantity

Return the SI unit of this quantity.

Overrides:

siUnit in class Quantity<Force,Force.Unit>

Returns:

the SI unit of this quantity

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 value,
 String unitString)

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

Parameters:

value - the value to use

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

divide

public final 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 final 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 final 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 final 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 final 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 final 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 final 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 final 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 final 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