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[整理] java.util.Calendar

1.Method_Add

輸出：

It?is?now?星期四?2006/08/17?at?05:55:57?下午?CST

Two?years?ago?was?星期二?2004/08/17?at?05:55:57?下午?CST

package ?api.java.util.Calendar;

import ?java.text.SimpleDateFormat;

import ?java.util.Calendar;

public ? class ?Method_Add? {

???? public ? static ? void ?main(String[]?a)? throws ?Exception? {

????????Calendar?now? = ?Calendar.getInstance();

????????

????????SimpleDateFormat?formatter? = ? new ?SimpleDateFormat(

???????????????? " E?yyyy/MM/dd?'at'?hh:mm:ss?a?zzz " );

????????System.out.println( " It?is?now? " ? + ?formatter.format(now.getTime()));

???????? /*

?????????*?public?abstract?void?add(int?field,?int

?????????*?amount)根據日歷的規則，為給定的日歷字段添加或減去指定的時間量。

????????? */

????????now.add(Calendar.YEAR,? - 2 );

????????System.out.println( " Two?years?ago?was? "

???????????????? + ?formatter.format(now.getTime()));

????}

}

主要經驗值獲得:
1. java.text.SimpleDateFormat 的用法
2. java.util.Calendar.add( ) 的用法，如何進行日期計算。

----------------------------------------------------------------------------------

2.Class_GregorianCalendar

輸出：

136?days?remain?in?current?year

package?api.java.util.Calendar;

import?java.util.Calendar;

import?java.util.GregorianCalendar;

public?class?Class_GregorianCalendar?{

????public?static?void?main(String?args[])?{

????????Calendar?calendar1?=?Calendar.getInstance();

????????int?doy1?=?calendar1.get(Calendar.DAY_OF_YEAR);

????????int?year?=?calendar1.get(Calendar.YEAR);

????????

????????//在具有默認語言環境的默認時區內構造一個帶有給定日期設置的?GregorianCalendar

????????Calendar?calendar2?=?new?GregorianCalendar(year,?11,?31);

????????int?doy2?=?calendar2.get(Calendar.DAY_OF_YEAR);

????????

????????//今年最后一天減去今天的剩余天數

????????int?days?=?doy2?-?doy1;

????????System.out.println(days?+?"?days?remain?in?current?year");

????}

}

主要經驗值獲得:
1. java.util.GregorianCalendar 的作用
2. 如何返回指定的日期的Calendar

次要經驗值獲得
1. 如何計算據今年結束的天數

----------------------------------------------------------------------------------

3.Class_Calendar

輸出：

ERA:?1

YEAR:?2006

MONTH:?7

WEEK_OF_YEAR:?33

WEEK_OF_MONTH:?3

DATE:?17

DAY_OF_MONTH:?17

DAY_OF_WEEK:?5

DAY_OF_WEEK_IN_MONTH:?3

AM_PM:?1

MILLISECOND:?92

ZONE_OFFSET:?8

DST_OFFSET:?0

package?api.java.util.Calendar;

import?java.util.Calendar;

import?java.util.Date;

import?java.util.GregorianCalendar;

public?class?Class_Calendar?{

????public?static?void?main(String[]?a)?{

????????Calendar?calendar?=?new?GregorianCalendar();

????????calendar.setTime(new?Date());

????????System.out.println("ERA:?"?+?calendar.get(Calendar.ERA));

????????System.out.println("YEAR:?"?+?calendar.get(Calendar.YEAR));

????????System.out.println("MONTH:?"?+?calendar.get(Calendar.MONTH));

????????System.out.println("WEEK_OF_YEAR:?"

????????????????+?calendar.get(Calendar.WEEK_OF_YEAR));

????????System.out.println("WEEK_OF_MONTH:?"

????????????????+?calendar.get(Calendar.WEEK_OF_MONTH));

????????System.out.println("DATE:?"?+?calendar.get(Calendar.DATE));

????????System.out.println("DAY_OF_MONTH:?"

????????????????+?calendar.get(Calendar.DAY_OF_MONTH));

????????System.out

????????????????.println("DAY_OF_WEEK:?"?+?calendar.get(Calendar.DAY_OF_WEEK));

????????System.out.println("DAY_OF_WEEK_IN_MONTH:?"

????????????????+?calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));

????????System.out.println("AM_PM:?"?+?calendar.get(Calendar.AM_PM));

????????System.out

????????????????.println("MILLISECOND:?"?+?calendar.get(Calendar.MILLISECOND));

????????System.out.println("ZONE_OFFSET:?"

????????????????+?(calendar.get(Calendar.ZONE_OFFSET)?/?(60?*?60?*?1000)));

????????System.out.println("DST_OFFSET:?"

????????????????+?(calendar.get(Calendar.DST_OFFSET)?/?(60?*?60?*?1000)));

????}

}

主要經驗值獲得:
1.?Calendar 的一些變量和方法用法

----------------------------------------------------------------------------------

4.

posted on 2006-08-17 18:00 方佳瑋閱讀(1861) 評論(1) 編輯收藏所屬分類: JAVA API 自學

import java.util.Calendar; import java.util.Scanner; public class Calendar{ public static void main(String[] args){ int m,n; System.out.println("請從鍵盤輸入年份:"); Scanner ym=new Scanner(System.in); m=ym.nextInt(); System.out.println("請從鍵盤輸入月份:"); n=ym.nextInt(); CalendarBean cb=new CalendarBean(); cb.setYear(m); cb.setMonth(n); String[] str="日一二三四五六".toCharArry(); for(char c:str){ System.out.println("%4c", c); } for(int i=0;i<a.length;i++){ if(i%7==0) System.out.println(); System.out.println("%4s",a[i]); } } } package xt9_8; import java.util.Calendar; public class CalendarBean{ String[] day; int year=2008,morth=0; public void setYear(int year){ this.year=year; } public void setMonth(int month){ this.month=month; } public String[] getCalendar(){ String[] a=new String[42]; Calendar 日歷 =Calendar.getIntstance(); 日歷.set(year,month-1,1); int 星期幾 =日歷.get(Calendar.Day_OF_WEEK)-1; int day=0; if(month==1||month==3||month==5||month==7||month==8||month10||month==12) day=31; if(month==4||month==6||month==9||month==11) day=30; if(month==2){ if(((year%4==0)&&(year%100!=0))||(year%400==0)) day=29; else day=28; } for(int i=0;i<星期幾;i++) a[i]=" "; for(int i=星期幾,n=1;i<星期幾+day;i++){ a[i]=String.Valueof(n); n++; } for(int i=星期幾+day;i<a.length;i++) a[i]=" "; return a; } }請問：這題怎么改回復更多評論

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