Package org.djunits.quantity

Class ElectricalResistance

java.lang.Object

java.lang.Number

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

org.djunits.quantity.ElectricalResistance

All Implemented Interfaces:

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

public class ElectricalResistance
extends Quantity<ElectricalResistance>

Electrical resistence measures the opposition to the flow of an electric current, and is expressed in ohm. Its reciprocal quantity is electrical conductance (expressed in siemens).

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	ElectricalResistance.Unit	ElectricalResistance.Unit encodes the opposition to the flow of electric current.

Field Summary

Fields

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

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

si

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
Dimensionless	divide(ElectricalResistance v)	Calculate the division of ElectricalResistance and ElectricalResistance, which results in a Dimensionless quantity.
ElectricalResistance.Unit	getDisplayUnit()	Retrieve the unit of this Value.
ElectricalResistance	instantiateSi(double siValue, UnitInterface<ElectricalResistance> displayUnit)	Instantiate a quantity with an SI or base value, and a display unit.
ElectricalInductance	multiply(Duration v)	Calculate the multiplication of ElectricalResistance and Duration, which results in a ElectricalInductance scalar.
Dimensionless	multiply(ElectricalConductance v)	Calculate the multiplication of ElectricalResistance and ElectricalConductance, which results in a Dimensionless scalar.
ElectricPotential	multiply(ElectricCurrent v)	Calculate the multiplication of ElectricalResistance and ElectricCurrent, which results in a ElectricPotential scalar.
static ElectricalResistance	of(double valueInUnit, String unitString)	Returns a ElectricalResistance based on a value and the textual representation of the unit, which can be localized.
static ElectricalResistance	of(double valueInUnit, ElectricalResistance.Unit unit)	Returns a ElectricalResistance based on a value expressed in the unit.
static ElectricalResistance	ofSi(double si)	Return a ElectricalResistance instance based on an SI value.
static ElectricalResistance	ofSi(double siValue, ElectricalResistance.Unit displayUnit)	Instantiate a ElectricalResistance quantity with an SI or base value and a display unit.
ElectricalConductance	reciprocal()	Return the reciprocal of this quantity (1/q).
static ElectricalResistance	valueOf(String text)	Returns a ElectricalResistance 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, 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 ElectricalResistance ZERO

Constant with value zero.

ONE

public static final ElectricalResistance ONE

Constant with value one.

NaN

public static final ElectricalResistance NaN

Constant with value NaN.

POSITIVE_INFINITY

public static final ElectricalResistance POSITIVE_INFINITY

Constant with value POSITIVE_INFINITY.

NEGATIVE_INFINITY

public static final ElectricalResistance NEGATIVE_INFINITY

Constant with value NEGATIVE_INFINITY.

POS_MAXVALUE

public static final ElectricalResistance POS_MAXVALUE

Constant with value MAX_VALUE.

NEG_MAXVALUE

public static final ElectricalResistance NEG_MAXVALUE

Constant with value -MAX_VALUE.

Constructor Details

ElectricalResistance

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

Instantiate a ElectricalResistance 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

ElectricalResistance

public ElectricalResistance(double valueInUnit,
 ElectricalResistance.Unit unit)

Instantiate a ElectricalResistance 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 ElectricalResistance ofSi(double si)

Return a ElectricalResistance instance based on an SI value.

Parameters:

si - the si value

Returns:

the ElectricalResistance instance based on an SI value

ofSi

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

Instantiate a ElectricalResistance 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 ElectricalResistance instance based on an SI value with the given display unit

instantiateSi

public ElectricalResistance instantiateSi(double siValue,
 UnitInterface<ElectricalResistance> 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<ElectricalResistance>

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 ElectricalResistance valueOf(String text)

Returns a ElectricalResistance 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 ElectricalResistance

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 ElectricalResistance of(double valueInUnit,
 ElectricalResistance.Unit unit)

Returns a ElectricalResistance 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 ElectricalResistance representation of the value in its unit

of

public static ElectricalResistance of(double valueInUnit,
 String unitString)

Returns a ElectricalResistance 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 ElectricalResistance.Unit getDisplayUnit()

Description copied from interface: Value

Retrieve the unit of this Value.

Specified by:

getDisplayUnit in interface Value<ElectricalResistance>

Overrides:

getDisplayUnit in class Quantity<ElectricalResistance>

Returns:

the unit of this Value

divide

public Dimensionless divide(ElectricalResistance v)

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

Parameters:

v - quantity

Returns:

quantity as a division of ElectricalResistance and ElectricalResistance

multiply

public Dimensionless multiply(ElectricalConductance v)

Calculate the multiplication of ElectricalResistance and ElectricalConductance, which results in a Dimensionless scalar.

Parameters:

v - scalar

Returns:

scalar as a multiplication of ElectricalResistance and ElectricalConductance

multiply

public ElectricPotential multiply(ElectricCurrent v)

Calculate the multiplication of ElectricalResistance and ElectricCurrent, which results in a ElectricPotential scalar.

Parameters:

v - scalar

Returns:

scalar as a multiplication of ElectricalResistance and ElectricCurrent

multiply

public ElectricalInductance multiply(Duration v)

Calculate the multiplication of ElectricalResistance and Duration, which results in a ElectricalInductance scalar.

Parameters:

v - scalar

Returns:

scalar as a multiplication of ElectricalResistance and Duration

reciprocal

public ElectricalConductance reciprocal()

Description copied from class: Quantity

Return the reciprocal of this quantity (1/q).

Overrides:

reciprocal in class Quantity<ElectricalResistance>

Returns:

the reciprocal of this quantity, with the correct SI units