RomanNumber.java

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package romannumberconversion;

/**
 *
 * @author roberta
 */
public enum RomanNumber {

    I(1),
    V(5),
    X(10),
    L(50),
    C(100),
    D(500),
    M(1000);

    private final int value;

    RomanNumber(int value) {
        this.value = value;
    }

    public int getValue() {
        return this.value;
    }

    /**
     * Devuelve el valor numérico de la letra romana
     *
     * @param l
     * @return
     */
    public static int parse(char l) {
        switch (l) {
            case 'I':
                return I.value;
            case 'V':
                return V.value;
            case 'X':
                return X.value;
            case 'L':
                return L.value;
            case 'C':
                return C.value;
            case 'D':
                return D.value;
            case 'M':
                return M.value;
            default:
                throw new IllegalArgumentException("Not a romand symbol!");
        }
    }
}