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Pi4J Java API & Runtime Library
package com.pi4j.temperature;
/*
* #%L
* **********************************************************************
* ORGANIZATION : Pi4J
* PROJECT : Pi4J :: Java Library (Core)
* FILENAME : TemperatureConversion.java
*
* This file is part of the Pi4J project. More information about
* this project can be found here: http://www.pi4j.com/
* **********************************************************************
* %%
* Copyright (C) 2012 - 2015 Pi4J
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
public class TemperatureConversion
{
public static final double ABSOLUTE_ZERO_CELSIUS = -273.15;
public static final double ABSOLUTE_ZERO_FARENHEIT = -459.67;
public static final double ABSOLUTE_ZERO_KELVIN = 0;
public static final double ABSOLUTE_ZERO_RANKINE = 0;
/**
* Convert a temperature value from one temperature scale to another.
*
* @param from TemperatureScale
* @param to TemperatureScale
* @param temperature value
* @return converted temperature value in the requested to scale
*/
public static double convert(TemperatureScale from, TemperatureScale to, double temperature) {
switch(from) {
case FARENHEIT:
return convertFromFarenheit(to, temperature);
case CELSIUS:
return convertFromCelsius(to, temperature);
case KELVIN:
return convertFromKelvin(to, temperature);
case RANKINE:
return convertFromRankine(to, temperature);
default:
throw(new RuntimeException("Invalid termpature conversion"));
}
}
/**
* Convert a temperature value from the Farenheit temperature scale to another.
*
* @param to TemperatureScale
* @param temperature value in degrees Farenheit
* @return converted temperature value in the requested to scale
*/
public static double convertFromFarenheit (TemperatureScale to, double temperature) {
switch(to) {
case FARENHEIT:
return temperature;
case CELSIUS:
return convertFarenheitToCelsius(temperature);
case KELVIN:
return convertFarenheitToKelvin(temperature);
case RANKINE:
return convertFarenheitToRankine(temperature);
default:
throw(new RuntimeException("Invalid termpature conversion"));
}
}
/**
* Convert a temperature value from another temperature scale into the Farenheit temperature scale.
*
* @param from TemperatureScale
* @param temperature value from other scale
* @return converted temperature value in degrees Farenheit
*/
public static double convertToFarenheit (TemperatureScale from, double temperature) {
switch(from) {
case FARENHEIT:
return temperature;
case CELSIUS:
return convertCelsiusToFarenheit(temperature);
case KELVIN:
return convertKelvinToFarenheit(temperature);
case RANKINE:
return convertRankineToFarenheit(temperature);
default:
throw(new RuntimeException("Invalid termpature conversion"));
}
}
/**
* Convert a temperature value from the Celsius temperature scale to another.
*
* @param to TemperatureScale
* @param temperature value in degrees centigrade
* @return converted temperature value in the requested to scale
*/
public static double convertFromCelsius(TemperatureScale to, double temperature) {
switch(to) {
case FARENHEIT:
return convertCelsiusToFarenheit(temperature);
case CELSIUS:
return temperature;
case KELVIN:
return convertCelsiusToKelvin(temperature);
case RANKINE:
return convertCelsiusToRankine(temperature);
default:
throw(new RuntimeException("Invalid termpature conversion"));
}
}
/**
* Convert a temperature value from another temperature scale into the Celsius temperature scale.
*
* @param from TemperatureScale
* @param temperature value from other scale
* @return converted temperature value in degrees centigrade
*/
public static double convertToCelsius (TemperatureScale from, double temperature) {
switch(from) {
case FARENHEIT:
return convertFarenheitToCelsius(temperature);
case CELSIUS:
return temperature;
case KELVIN:
return convertKelvinToCelsius(temperature);
case RANKINE:
return convertRankineToCelsius(temperature);
default:
throw(new RuntimeException("Invalid termpature conversion"));
}
}
/**
* Convert a temperature value from the Kelvin temperature scale to another.
*
* @param to TemperatureScale
* @param temperature value in Kelvin
* @return converted temperature value in the requested to scale
*/
public static double convertFromKelvin(TemperatureScale to, double temperature) {
switch(to) {
case FARENHEIT:
return convertKelvinToFarenheit(temperature);
case CELSIUS:
return convertKelvinToCelsius(temperature);
case KELVIN:
return temperature;
case RANKINE:
return convertKelvinToRankine(temperature);
default:
throw(new RuntimeException("Invalid termpature conversion"));
}
}
/**
* Convert a temperature value from another temperature scale into the Kelvin temperature scale.
*
* @param from TemperatureScale
* @param temperature value from other scale
* @return converted temperature value in Kelvin
*/
public static double convertToKelvin(TemperatureScale from, double temperature) {
switch(from) {
case FARENHEIT:
return convertFarenheitToKelvin(temperature);
case CELSIUS:
return convertCelsiusToKelvin(temperature);
case KELVIN:
return temperature;
case RANKINE:
return convertRankineToKelvin(temperature);
default:
throw(new RuntimeException("Invalid termpature conversion"));
}
}
/**
* Convert a temperature value from the Rankine temperature scale to another.
*
* @param to TemperatureScale
* @param temperature value in degrees Rankine
* @return converted temperature value in the requested to scale
*/
public static double convertFromRankine(TemperatureScale to, double temperature) {
switch(to) {
case FARENHEIT:
return convertRankineToFarenheit(temperature);
case CELSIUS:
return convertRankineToCelsius(temperature);
case KELVIN:
return convertRankineToKelvin(temperature);
case RANKINE:
return temperature;
default:
throw(new RuntimeException("Invalid termpature conversion"));
}
}
/**
* Convert a temperature value from another temperature scale into the Rankine temperature scale.
*
* @param from TemperatureScale
* @param temperature value from other scale
* @return converted temperature value in degrees Rankine
*/
public static double convertToRankine(TemperatureScale from, double temperature) {
switch(from) {
case FARENHEIT:
return convertFarenheitToRankine(temperature);
case CELSIUS:
return convertCelsiusToRankine(temperature);
case KELVIN:
return convertKelvinToRankine(temperature);
case RANKINE:
return temperature;
default:
throw(new RuntimeException("Invalid termpature conversion"));
}
}
/**
* Convert temperature from Farenheit to Celsius temperature scale
*
* FORMULA = [°C] = ([°F] − 32) × 5/9
*
* @param temperature value in degrees Farenheit
* @return converted temperature value in degrees Celsius
*/
public static double convertFarenheitToCelsius(double temperature) {
return ((temperature - 32) * 5/9);
}
/**
* Convert temperature from Farenheit to Kelvin temperature scale
*
* FORMULA = [K] = ([°F] + 459.67) × 5/9
*
* @param temperature value in degrees Farenheit
* @return converted temperature value in degrees Kelvin
*/
public static double convertFarenheitToKelvin(double temperature) {
return (((temperature + 459.67) * 5) / 9);
}
/**
* Convert temperature from Farenheit to Rankine temperature scale
*
* FORMULA = [°R] = [°F] + 459.67
*
* @param temperature value in degrees Farenheit
* @return converted temperature value in degrees Rankine
*/
public static double convertFarenheitToRankine(double temperature) {
return temperature + 459.67;
}
/**
* Convert temperature from Celsius to Farenheit temperature scale
*
* FORMULA = [°F] = [°C] × 9/5 + 32
*
* @param temperature value in degrees Celsius
* @return converted temperature value in degrees Farenheit
*/
public static double convertCelsiusToFarenheit(double temperature) {
return (((temperature * 9) / 5) + 32);
}
/**
* Convert temperature from Celsius to Kelvin temperature scale
*
* FORMULA = [K] = [°C] + 273.15
*
* @param temperature value in degrees Celsius
* @return converted temperature value in degrees Kelvin
*/
public static double convertCelsiusToKelvin(double temperature) {
return (temperature - ABSOLUTE_ZERO_CELSIUS);
}
/**
* Convert temperature from Celsius to Rankine temperature scale
*
* FORMULA = [°R] = ([°C] + 273.15) × 9/5
*
* @param temperature value in degrees Celsius
* @return converted temperature value in degrees Rankine
*/
public static double convertCelsiusToRankine(double temperature) {
return (((temperature-ABSOLUTE_ZERO_CELSIUS) * 9) / 5);
}
/**
* Convert temperature from Kelvin to Celsius temperature scale
*
* FORMULA = [°C] = [K] − 273.15
*
* @param temperature value in degrees Kelvin
* @return converted temperature value in degrees Celsius
*/
public static double convertKelvinToCelsius(double temperature) {
return (temperature + ABSOLUTE_ZERO_CELSIUS);
}
/**
* Convert temperature from Kelvin to Farenheit temperature scale
*
* FORMULA = [°F] = [K] × 9/5 − 459.67
*
* @param temperature value in degrees Kelvin
* @return converted temperature value in degrees Farenheit
*/
public static double convertKelvinToFarenheit(double temperature) {
return (((temperature * 9) / 5) - 459.67);
}
/**
* Convert temperature from Kelvin to Rankine temperature scale
*
* FORMULA = [°R] = [K] × 9/5
*
* @param temperature value in degrees Kelvin
* @return converted temperature value in degrees Rankine
*/
public static double convertKelvinToRankine(double temperature) {
return ((temperature * 9) / 5);
}
/**
* Convert temperature from Rankine to Farenheit temperature scale
*
* FORMULA = [°F] = [°R] − 459.67
*
* @param temperature value in degrees Rankine
* @return converted temperature value in degrees Farenheit
*/
public static double convertRankineToFarenheit(double temperature) {
return (temperature-(459.67));
}
/**
* Convert temperature from Rankine to Celsius temperature scale
*
* FORMULA = [°C] = ([°R] − 491.67) × 5/9
*
* @param temperature value in degrees Rankine
* @return converted temperature value in degrees Celsius
*/
public static double convertRankineToCelsius(double temperature) {
return (((temperature-491.67)* 5) / 9);
}
/**
* Convert temperature from Rankine to Kelvin temperature scale
*
* FORMULA = [K] = [°R] × 5/9
*
* @param temperature value in degrees Rankine
* @return converted temperature value in degrees Kelvin
*/
public static double convertRankineToKelvin(double temperature) {
return ((temperature * 5) / 9);
}
}
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