public class DriversLicense extends IDCard {

    public static int currentYear = 2016; //the current year (can be updated)
    private int expYear; //the expiration year

    /**
     * default constructor for DriversLicense
     */
    public DriversLicense() {
        super();
        expYear = 0;
    }

    /**
     * modified constructor for DriversLicense
     * @param n the name of the person
     * @param y the expiration year
     */
    public DriversLicense(String n, String id, int y) {
        super(n, id);
        expYear = y;
    }

    /**
     * checks to see if the card is expired
     * @return expiration status
     */
    public boolean isExpired() {
        return (currentYear > expYear) ? true : false;
    }

    /**
     * gets the expiration year
     * @return expYear the expiration year
     */
    public int getExpYear() {
        return expYear;
    }

    /**
     * gets the current year
     * @return currentYear the current year
     */
    public int getCurrentYear() {
        return currentYear;
    }

    /**
     * updates the expiration date for renewal
     * @param y the new expiration year
     */
    public void updateExpYear(int y) {
        expYear = y;
    }

    /**
     * changes the current year
     * @param y the new current year
     */
    public static void updateCurrentYear(int y) {
        currentYear = y;
    }
}