public class Card implements Comparable
{
    // other methods and data fields not shown

    /**
     * Return a value according to whether
     * this Card is greater, equal to, or less than
     * the card passed in as parameter o. The value
     * returned is consistent with the specifications
     * of the Comparable interface's compareTo method.
     */
    public int compareTo(Object o)
    {
	// implementation not shown
	return 1;
    }
}