org.osgi.util.measurement

Class Unit

java.lang.Object

org.osgi.util.measurement.Unit

public class Unit
extends java.lang.Object

A unit system for measurements. This class contains definitions of the most common SI units.

This class only support exponents for the base SI units in the range -64 to +63. Any operation which produces an exponent outside of this range will result in a Unit object with undefined exponents.

Author:

$Id: e97563d26244bd44b59b81febc33cdfb418729a8 $

Immutable

Field Summary

Fields

Modifier and Type	Field and Description
static Unit	A The electric current unit ampere (A)
static Unit	C The electric charge unit coulomb (C).
static Unit	cd The luminous intensity unit candela (cd)
static Unit	F The capacitance unit farad (F).
static Unit	Gy The absorbed dose unit gray (Gy).
static Unit	Hz The frequency unit hertz (Hz).
static Unit	J The energy unit joule (J).
static Unit	K The temperature unit kelvin (K)
static Unit	kat The catalytic activity unit katal (kat).
static Unit	kg The mass unit kilogram (kg)
static Unit	lx The illuminance unit lux (lx).
static Unit	m The length unit meter (m)
static Unit	m_s The speed unit meter per second (m/s)
static Unit	m_s2 The acceleration unit meter per second squared (m/s2)
static Unit	m2 The area unit square meter (m2)
static Unit	m3 The volume unit cubic meter (m3)
static Unit	mol The amount of substance unit mole (mol)
static Unit	N The force unit newton (N).
static Unit	Ohm The electric resistance unit ohm.
static Unit	Pa The pressure unit pascal (Pa).
static Unit	rad The angle unit radians (rad)
static Unit	s The time unit second (s)
static Unit	S The electric conductance unit siemens (S).
static Unit	T The magnetic flux density unit tesla (T).
static Unit	unity No Unit (Unity)
static Unit	V The electric potential difference unit volt (V).
static Unit	W The power unit watt (W).
static Unit	Wb The magnetic flux unit weber (Wb).

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) Checks whether this Unit object is equal to the specified Unit object.
int	hashCode() Returns the hash code for this object.
java.lang.String	toString() Returns a String object representing the Unit

Methods inherited from class java.lang.Object

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

Field Detail

unity

public static final Unit unity

No Unit (Unity)

m

public static final Unit m

The length unit meter (m)

s

public static final Unit s

The time unit second (s)

kg

public static final Unit kg

The mass unit kilogram (kg)

K

public static final Unit K

The temperature unit kelvin (K)

A

public static final Unit A

The electric current unit ampere (A)

mol

public static final Unit mol

The amount of substance unit mole (mol)

cd

public static final Unit cd

The luminous intensity unit candela (cd)

m_s

public static final Unit m_s

The speed unit meter per second (m/s)

m_s2

public static final Unit m_s2

The acceleration unit meter per second squared (m/s²)

m2

public static final Unit m2

The area unit square meter (m²)

m3

public static final Unit m3

The volume unit cubic meter (m³)

Hz

public static final Unit Hz

The frequency unit hertz (Hz).

hertz is expressed in SI units as 1/s

N

public static final Unit N

The force unit newton (N).

N is expressed in SI units as m·kg/s²

Pa

public static final Unit Pa

The pressure unit pascal (Pa).

Pa is equal to N/m² or is expressed in SI units as kg/m·s²

J

public static final Unit J

The energy unit joule (J).

joule is equal to N·m or is expressed in SI units as m²·kg/s²

W

public static final Unit W

The power unit watt (W).

watt is equal to J/s or is expressed in SI units as m²·kg/s³

C

public static final Unit C

The electric charge unit coulomb (C).

coulomb is expressed in SI units as s·A

V

public static final Unit V

The electric potential difference unit volt (V).

volt is equal to W/A or is expressed in SI units as m²·kg/s³·A

F

public static final Unit F

The capacitance unit farad (F).

farad is equal to C/V or is expressed in SI units as s⁴·A²/m²·kg

Ohm

public static final Unit Ohm

The electric resistance unit ohm.

ohm is equal to V/A or is expressed in SI units as m²·kg/s³·A²

S

public static final Unit S

The electric conductance unit siemens (S).

siemens is equal to A/V or is expressed in SI units as s³·A²/m²·kg

Wb

public static final Unit Wb

The magnetic flux unit weber (Wb).

weber is equal to V·s or is expressed in SI units as m²·kg/s²·A

T

public static final Unit T

The magnetic flux density unit tesla (T).

tesla is equal to Wb/m² or is expressed in SI units as kg/s²·A

lx

public static final Unit lx

The illuminance unit lux (lx).

lux is expressed in SI units as cd/m²

Gy

public static final Unit Gy

The absorbed dose unit gray (Gy).

Gy is equal to J/kg or is expressed in SI units as m²/s²

kat

public static final Unit kat

The catalytic activity unit katal (kat).

katal is expressed in SI units as mol/s

rad

public static final Unit rad

The angle unit radians (rad)

Method Detail

equals

public boolean equals(java.lang.Object obj)

Checks whether this Unit object is equal to the specified Unit object. The Unit objects are considered equal if their exponents are equal.

Overrides:

equals in class java.lang.Object

Parameters:

obj - the Unit object that should be checked for equality

Returns:

true if the specified Unit object is equal to this Unit object.

hashCode

public int hashCode()

Returns the hash code for this object.

Overrides:

hashCode in class java.lang.Object

Returns:

This object's hash code.

toString

public java.lang.String toString()

Returns a String object representing the Unit

Overrides:

toString in class java.lang.Object

Returns:

A String object representing the Unit