Package org.djunits.quantity

Class Mass

java.lang.Object
java.lang.Number
org.djunits.quantity.def.Quantity<Mass,Mass.Unit>
org.djunits.quantity.Mass
All Implemented Interfaces:
Serializable, Comparable<Mass>, Additive<Mass>, Scalable<Mass>, Value<Mass.Unit,Mass>
public class Mass extends Quantity<Mass,Mass.Unit>
Mass is the amount of matter in an object, measured in kilograms (kg).

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:

  • Field Details

    • ZERO

      public static final Mass ZERO
      Constant with value zero.

    • ONE

      public static final Mass ONE
      Constant with value one.

    • NaN

      public static final Mass NaN
      Constant with value NaN.

    • POSITIVE_INFINITY

      public static final Mass POSITIVE_INFINITY
      Constant with value POSITIVE_INFINITY.

    • NEGATIVE_INFINITY

      public static final Mass NEGATIVE_INFINITY
      Constant with value NEGATIVE_INFINITY.

    • POS_MAXVALUE

      public static final Mass POS_MAXVALUE
      Constant with value MAX_VALUE.

    • NEG_MAXVALUE

      public static final Mass NEG_MAXVALUE
      Constant with value -MAX_VALUE.

  • Constructor Details

    • Mass

      public Mass(double value, Mass.Unit unit)
      Instantiate a Mass quantity with a unit.
      Parameters:
      value - the value, expressed in the unit
      unit - the unit in which the value is expressed

    • Mass

      public Mass(double value, String abbreviation)
      Instantiate a Mass 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

    • Mass

      public Mass(Mass value)
      Construct Mass quantity.
      Parameters:
      value - Scalar from which to construct this instance

  • Method Details

    • ofSi

      public static Mass ofSi(double si)
      Return a Mass instance based on an SI value.
      Parameters:
      si - the si value
      Returns:
      the Mass instance based on an SI value

    • instantiate

      public Mass instantiate(double si)
      Description copied from class: Quantity
      Instantiate a quantity with an SI or base value.
      Specified by:
      instantiate in class Quantity<Mass,Mass.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<Mass,Mass.Unit>
      Returns:
      the SI unit of this quantity

    • valueOf

      public static Mass valueOf(String text)
      Returns a Mass 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 Mass
      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 Mass of(double value, String unitString)
      Returns a Mass 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(Mass v)
      Calculate the division of Mass and Mass, which results in a Dimensionless quantity.
      Parameters:
      v - quantity
      Returns:
      quantity as a division of Mass and Mass

    • divide

      public final Duration divide(FlowMass v)
      Calculate the division of Mass and FlowMass, which results in a Duration scalar.
      Parameters:
      v - scalar
      Returns:
      scalar as a division of Mass and FlowMass

    • divide

      public final FlowMass divide(Duration v)
      Calculate the division of Mass and Duration, which results in a FlowMass scalar.
      Parameters:
      v - scalar
      Returns:
      scalar as a division of Mass and Duration

    • multiply

      public final Force multiply(Acceleration v)
      Calculate the multiplication of Mass and Acceleration, which results in a Force scalar.
      Parameters:
      v - scalar
      Returns:
      scalar as a multiplication of Mass and Acceleration

    • multiply

      public final FlowMass multiply(Frequency v)
      Calculate the multiplication of Mass and Frequency, which results in a FlowMass scalar.
      Parameters:
      v - scalar
      Returns:
      scalar as a multiplication of Mass and Frequency

    • divide

      public final Volume divide(Density v)
      Calculate the division of Mass and Density, which results in a Volume scalar.
      Parameters:
      v - scalar
      Returns:
      scalar as a division of Mass and Density

    • divide

      public final Density divide(Volume v)
      Calculate the division of Mass and Volume, which results in a Density scalar.
      Parameters:
      v - scalar
      Returns:
      scalar as a division of Mass and Volume

    • multiply

      public final Momentum multiply(Speed v)
      Calculate the multiplication of Mass and Speed, which results in a Momentum scalar.
      Parameters:
      v - scalar
      Returns:
      scalar as a multiplication of Mass and Speed