import java.text.DecimalFormat;

/**
 * Lab #5
 * CS 2334
 * October 26, 2004
 * <P>
 * This class models temperature. It stores temperature in Kelvin
 * and can convert temperatures to Celsius and Fahrenheit.
 * </P>
 * @author Brian F. Veale
 * @version 1.0
 */
public class Temperature
{
   /** The temperature stored in Kelvin. */
   float tempKelvin;

   /**
    * This initializes the temperature to 0 degrees Kelvin.
    */   
   public Temperature()
   {
      tempKelvin = 0.0F;
   }

   /**
    * This method returns the temperature in Kelvin as a String.
    * <P>
    * @return   The temperature as a String in Kelvin.
    */
   public String getKelvin()
   {
      DecimalFormat formatter = new DecimalFormat( "###.##" );
      
      return formatter.format( tempKelvin );
   }

   /**
    * This method returns the temperature in Celsius as a String.
    * <P>
    * @return   The temperature as a String in Celsius.
    */
   public String getCelsius()
   {
      DecimalFormat formatter = new DecimalFormat( "###.##" );

      float temp = tempKelvin - 273.15F;
      
      return formatter.format( temp );
   }

   /**
    * This method returns the temperature in Fahrenheit as a String.
    * <P>
    * @return   The temperature as a String in Fahrenheit.
    */
   public String getFahrenheit()
   {
      DecimalFormat formatter = new DecimalFormat( "###.##" );

      float temp = tempKelvin * 1.8F - 459.67F;
      
      return formatter.format( temp );
   }

   /**
    * This method sets the temperature.  The temperature passed
    * in is in Fahrenheit and is converted into Kelvin.
    * <P>
    * @param       temp   The temperature in Fahrenheit.
    */
   public void setFahrenheit( float temp )
   {
      tempKelvin = (temp + 459.67F) / 1.8F;
   }
}