henbane wrote:
又有一个问题，那如何判断周岁呢？
上面的是判断虚岁可以

import java.util.*;

/** DateDiff -- compute the difference between two dates. */
public class DateDiff {
       public static void main(String[] av) {
                /** The date at the end of the last century */
                Date d1 = new GregorianCalendar(2000,11,31,23,59).getTime( );
                /** Today's date */
                Date today = new Date( );
                // Get msec from each, and subtract.
                long diff = today.getTime( ) - d1.getTime( );

                System.out.println("The 21st century (up to " + today + 
                        ") is " + (diff / (1000*60*60*24)) + " days old.");
        }
}