Temperature conversion

I wanted to implement a Fahrenheit to Celsius and Celsius to Fahrenheit API.

Inside this code In terms of beginning Java samples you have: Use of floating-point arithmetic.

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package com.etretatlogiciels.samples.converters;

/**
 * I just wanted to implement a Fahrenheit to Celsius converter in Java.
 *
 * TODO: There are too many decimals given in the answers; round these.
 *
 * @author Russell Bateman, April 2009
 */
public class TemperatureConversion
{
  public static float celsiusToFahrenheit( float celsius )
  {
    return( celsius * 9 / 5 ) + 32;
  }

  public static float fahrenheitToCelsius( float fahrenheit )
  {
    return( fahrenheit - 32 ) * 5 / 9;
  }

  public static void main( String[] args )
  {
    System.out.println( "-273C is "
                        + TemperatureConversion.celsiusToFahrenheit( -273 )
                        + " degrees Fahrenheit" );
    System.out.println( "-40F is "
                        + TemperatureConversion.fahrenheitToCelsius( -40 )
                        + " degrees Celsius" );
    System.out.println( "100C is "
                        + TemperatureConversion.celsiusToFahrenheit( 100 )
                        + " degrees Fahrenheit" );
    System.out.println();
    System.out.println( "Bake bread at "
                        + TemperatureConversion.fahrenheitToCelsius( 500 )
                        + " degrees Celsius (500F)" );
    System.out.println( "Good barbecue slowly reaches "
                        + TemperatureConversion.fahrenheitToCelsius( 205 )
                        + " degrees Celsius (205)" );
  }
}
// vim: set tabstop=2 shiftwidth=2 noexpandtab:

Console output

-273C is -459.4 degrees Fahrenheit
-40F is -40.0 degrees Celsius
100C is 212.0 degrees Fahrenheit

Bake bread at 260.0 degrees Celsius (500F)
Good barbecue slowly reaches 96.111115 degrees Celsius (205F)