public enum Prefix {
    // These are the values of this enumerated type.
    // Each one is followed by constructor arguments in parentheses.
    // The values are separated from each other by commas, and the 
    // list of values is terminated with a semicolon to separate it from
    // the class body that follows.
    MILLI("m",    .001),
    CENTI("c",    .01),
    DECI("d",     .1),
    DECA("D",   10.0),
    HECTA("h", 100.0),
    KILO("k", 1000.0);  // Note semicolon


    // This is the constructor invoked for each value above.
    Prefix(String abbrev, double multiplier) {
        this.abbrev = abbrev;
        this.multiplier = multiplier;
    }

    // These are the private fields set by the constructor
    private String abbrev;
    private double multiplier;

    // These are accessor methods for the fields.  They are instance methods
    // of each value of the enumerated type.
    public String abbrev() { return abbrev; }
    public double multiplier() { return multiplier; }
}