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JAVA CalendarÏê½â
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¾¿¾¹Ê²Ã´ÊÇÒ»¸ö Calendar ÄØ£¿ÖÐÎĵķ­Òë¾ÍÊÇÈÕÀú£¬ÄÇÎÒÃÇÁ¢¿Ì¿ÉÒÔÏëµ½ÎÒÃÇÉú»îÖÐÓÐÑô(¹«)Àú¡¢Òõ(Å©)ÀúÖ®·Ö¡£ËüÃǵÄÇø±ðÔÚÄÄÄØ£¿
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ʵ¼ÊÉÏ£¬ÔÚÀúÊ·ÉÏÓÐ×ÅÐí¶àÖÖ¼ÍÔªµÄ·½·¨¡£ËüÃǵIJîÒìʵÔÚÌ«´óÁË£¬±ÈÈç˵һ¸öÈ˵ÄÉúÈÕÊÇ"°ËÔ°ËÈÕ" ÄÇôһÖÖ¿ÉÄÜÊÇÑô(¹«)ÀúµÄ°ËÔ°ËÈÕ£¬µ«Ò²¿ÉÒÔÊÇÒõ(Å©)ÀúµÄÈÕÆÚ¡£ËùÒÔΪÁ˼ÆÊ±µÄͳһ£¬±ØÐèÖ¸¶¨Ò»¸öÈÕÀúµÄÑ¡Ôñ¡£ÄÇÏÖÔÚ×îΪÆÕ¼°ºÍͨÓõÄÈÕÀú¾ÍÊÇ "Gregorian Calendar"¡£Ò²¾ÍÊÇÎÒÃÇÔÚ½²ÊöÄê·Ýʱ³£Óà "¹«Ôª¼¸¼¸Äê"¡£Calendar ³éÏóÀඨÒåÁË×ã¹»µÄ·½·¨£¬ÈÃÎÒÃÇÄܹ»±íÊöÈÕÀúµÄ¹æÔò¡£Java ±¾ÉíÌṩÁË¶Ô "Gregorian Calendar" ¹æÔòµÄʵÏÖ¡£ÎÒÃÇ´Ó Calendar.getInstance() ÖÐËù»ñµÃµÄʵÀý¾ÍÊÇÒ»¸ö "GreogrianCalendar" ¶ÔÏó(ÓëÄúͨ¹ý new GregorianCalendar() »ñµÃµÄ½á¹ûÒ»ÖÂ)¡£
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import java.io.*;
import java.util.*;
public class WhatIsCalendar
{
public static void main(String[] args) {
Calendar calendar = Calendar.getInstance();
if (calendar instanceof GregorianCalendar)
System.out.println("It is an instance of GregorianCalendar"t;
}
}
Calendar ÔÚ Java ÖÐÊÇÒ»¸ö³éÏóÀà(Abstract Class)£¬GregorianCalendar ÊÇËüµÄÒ»¸ö¾ßÌåʵÏÖ¡£
ÎÒÃÇÒ²¿ÉÒÔ×Ô¼ºµÄ Calendar ʵÏÖÀ࣬Ȼºó½«Ëü×÷Ϊ Calendar ¶ÔÏó·µ»Ø(ÃæÏò¶ÔÏóµÄÌØÐÔ)¡£ÔÚ IBM alphaWorks ÉÏ£¬IBM µÄ¿ª·¢ÈËԱʵÏÖÁ˶àÖÖÈÕÀú(http://www.alphaworks.ibm.com/tech/calendars)¡£Í¬ÑùÔÚ Internet ÉÏ£¬Ò²ÓжÔÖйúÅ©ÀúµÄʵÏÖ¡£±¾ÎĶÔÈçºÎÀ©Õ¹ Calendar ²»×÷ÌÖÂÛ£¬´ó¼Ò¿ÉÒÔͨ¹ý²ì¿´ÉÏÊö Calendar µÄÔ´ÂëÀ´Ñ§Ï°¡£
Calendar Óë Date µÄת»»·Ç³£¼òµ¥£º
Calendar calendar = Calendar.getInstance();
// ´ÓÒ»¸ö Calendar ¶ÔÏóÖлñÈ¡ Date ¶ÔÏó
Date date = calendar.getTime();
// ½« Date ¶ÔÏó·´Ó¦µ½Ò»¸ö Calendar ¶ÔÏóÖУ¬
// Calendar/GregorianCalendar ûÓй¹Ô캯Êý¿ÉÒÔ½ÓÊÜ Date ¶ÔÏó
// ËùÒÔÎÒÃDZØÐèÏÈ»ñµÃÒ»¸öʵÀý£¬È»ºóÉèÖà Date ¶ÔÏó
calendar.setTime(date);
Calendar ¶ÔÏóÔÚʹÓÃʱ£¬ÓÐһЩֵµÃ×¢ÒâµÄÊÂÏ
1. Calendar µÄ set() ·½·¨


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