/**
*  This program was downloaded from the java sun tutorial.  
*  The URL is http://java.sun.com/docs/books/tutorial/java/javaOO/enum.html
*  It is intended to illustrate the use of the "for each" loop, also known as the
*  "enhanced for" loop.
*  It needs to be run from the command line with arg[0] being a number representing a
*  number of pounds that a person weighs on earth
*
*  @author - unknown
*  @version - unknown - downloaded  September 10, 2008
*/

public enum Planet 
{
    MERCURY (3.303e+23, 2.4397e6),
    VENUS   (4.869e+24, 6.0518e6),
    EARTH   (5.976e+24, 6.37814e6),
    MARS    (6.421e+23, 3.3972e6),
    JUPITER (1.9e+27,   7.1492e7),
    SATURN  (5.688e+26, 6.0268e7),
    URANUS  (8.686e+25, 2.5559e7),
    NEPTUNE (1.024e+26, 2.4746e7);

    private final double mass;   // in kilograms
    private final double radius; // in meters
  
    Planet(double mass, double radius) 
	 {
        this.mass = mass;
        this.radius = radius;
    }
    private double mass()   { return mass; }
    private double radius() { return radius; }

    // universal gravitational constant  (m3 kg-1 s-2)
    public static final double G = 6.67300E-11;

    double surfaceGravity() {
        return G * mass / (radius * radius);
    }
    double surfaceWeight(double otherMass) {
        return otherMass * surfaceGravity();
    }
    public static void main(String[] args) {
        double earthWeight = Double.parseDouble(args[0]);
        double mass = earthWeight/EARTH.surfaceGravity();
       
		 
		 
		  for (Planet p : Planet.values())
           System.out.printf("Your weight on %s is %f%n",
                             p, p.surfaceWeight(mass));
    }
}