# Class Velocity<D extends Unit<D>>

java.lang.Object
edu.wpi.first.units.Unit<Velocity<D>>
edu.wpi.first.units.Velocity<D>
Type Parameters:
D - the distance unit, such as Angle or Distance

public class Velocity<D extends Unit<D>>
extends Unit<Velocity<D>>
Unit of velocity dimension that is a combination of a distance unit (numerator) and a time unit (denominator).

This is the base type for units of velocity dimension. It is also used in combination with a distance dimension to specify the dimension for Measure. For example: Measure<Velocity<Distance>>.

Actual units (such as Units.MetersPerSecond and Units.RPM) can be found in the Units class.

• ## Method Details

• ### combine

public static <D extends Unit<D>> Velocity<D> combine​(Unit<D> numerator, Time period, String name, String symbol)
Creates a new velocity unit derived from an arbitrary numerator and time period units.

Results of this method are cached so future invocations with the same arguments will return the pre-existing units instead of generating new identical ones.

Velocity.combine(Kilograms, Second) // mass flow
Velocity.combine(Feet, Millisecond) // linear speed

Velocity.combine(Feet.per(Second), Second) // linear acceleration in ft/s/s

It's recommended to use the convenience function Unit.per(Time) instead of calling this factory directly.

Type Parameters:
D - the type of the numerator unit
Parameters:
numerator - the numerator unit
period - the period for unit time
name - the name of the new velocity unit
symbol - the symbol of the new velocity unit
Returns:
the new unit
• ### combine

public static <D extends Unit<D>> Velocity<D> combine​(Unit<D> numerator, Time period)
Creates a new velocity unit derived from an arbitrary numerator and time period units.

Results of this method are cached so future invocations with the same arguments will return the pre-existing units instead of generating new identical ones.

This method automatically generates a new name and symbol for the new velocity unit.

Velocity.combine(Kilograms, Second) // mass flow
Velocity.combine(Feet, Millisecond) // linear speed

Velocity.combine(Feet.per(Second), Second) // linear acceleration in ft/s/s

It's recommended to use the convenience function Unit.per(Time) instead of calling this factory directly.

Type Parameters:
D - the type of the numerator unit
Parameters:
numerator - the numerator unit
period - the period for unit time
Returns:
the new unit
• ### getUnit

public D getUnit()
Gets the major unit being measured (eg Meters for Meters per Second).
Returns:
the major unit
• ### getPeriod

public Time getPeriod()
Gets the period unit of the velocity, eg Seconds or Milliseconds.
Returns:
the period unit
• ### equals

public boolean equals​(Object o)
Overrides:
equals in class Unit<Velocity<D extends Unit<D>>>
• ### hashCode

public int hashCode()
Overrides:
hashCode in class Unit<Velocity<D extends Unit<D>>>