Null-safe comparison methods for finding most recent / least recent dates.
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                 Key: LANG-291
                 URL: http://issues.apache.org/jira/browse/LANG-291
             Project: Commons Lang
          Issue Type: Improvement
         Environment: N/A
            Reporter: David J. M. Karlsen


/**
     * <p>
     * Null-safe date comparison.
     * Returnes the most recent date if date1 and date2 is non-null. 
     * If one of the dates are null, the non-null will be returned.
     * If both are null, null will be returned.
     * </p>
     * @param date1
     * @param date2
     * @return
     */
    public static Date mostRecent( Date date1, Date date2 )

 /**
     * <p>
     * Null-safe date comparison.
     * Returnes the least recent (oldest) date if date1 and date2 is non-null. 
     * If one of the dates are null, the non-null will be returned.
     * If both are null, null will be returned.
     * </p>
     * @param date1
     * @param date2
     * @return
     */
    public static Date leastRecent( Date date1, Date date2 )

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