Here's a simple program to convert temperatures between degrees Celcius, Fahrenheit and Kelvin written in Java. There's no GUI used here - all output is done via the command line.
The forumulae for the conversions were obtained from Temperature conversion forumlas on Wikipedia
File: Converter.java
/**
* Conversion between temperatures in Celcius, Fahrenheit and Kelvin
* Uses conversion forumulas from the wikipedia:
* http://en.wikipedia.org/wiki/Temperature_conversion_formulas
* User: Steven
* Date: 27-Dec-2005
*/
public class Converter {
public Converter()
{
}
// Method to convert from degrees Celcius to degrees Fahrenheit
public static float celciusToFahrenheit(float degCelcius)
{
float degFahrenheit;
degFahrenheit = degCelcius * 9/5 + 32;
return degFahrenheit;
}
// Method to convert from degrees Fahrenheit to degrees Celcius
public static float fahrenheitToCelcius(float degFahrenheit)
{
float degCelcius;
degCelcius = (degFahrenheit - 32) * 5/9;
return degCelcius;
}
// Method to convert from degrees Celcius to degrees Kelvin
public static float celciusToKelvin(float degCelcius)
{
float degKelvin;
degKelvin = degCelcius + 273.15f;
return degKelvin;
}
// Method to convert from degrees Kelvin to degrees Celcius
public static float kelvinToCelcius(float degKelvin)
{
float degCelcius;
degCelcius = degKelvin - 273.15f;
return degCelcius;
}
// Main method demonstrating usage of above methods
public static void main(String[] args)
{
System.out.print("100 degrees Celcius in Fahrenheit is: ");
System.out.println(celciusToFahrenheit(100));
System.out.print("-40 degrees Fahrenheit in Celcius is: ");
System.out.println(fahrenheitToCelcius(-40));
System.out.print("0 degrees Celcius in Kelvin is: ");
System.out.println(celciusToKelvin(0));
// to convert from Kelvin to Fahrenheit, combine two methods:
System.out.print("373.15 degrees Kelvin in Fahrenheit is: ");
System.out.println(celciusToFahrenheit(kelvinToCelcius(373.15f)));
}
}
