calendar模塊中month的作用？

作用解析與事例

package pack.java.calendar.demo;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import java.util.GregorianCalendar;

public class CalendarDemo {

private static SimpleDateFormat date_format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");

public static void main(String[] args) {

//獲取calendar實例;

Calendar calendar = Calendar.getInstance();

//判斷calendar是不是GregorianCalendar類的實例;

if(calendar instanceof GregorianCalendar){

System.out.println("屬于GregorianCalendar類的實例!");

}

//從calendar對象中獲得date對象，當前時間;

Date dates = calendar.getTime();

//格式化時間;

String date_str= date_format.format(dates);

System.out.println(date_str);

//設置月份05；代表日歷的月份6月，因為月份從0開始。

calendar.set(Calendar.MONTH, 05);

int months = calendar.get(Calendar.MONTH);

System.out.println(months); //輸出05;

//設置日期為2011-07-24 09：59:50

calendar.set(2011, 06, 24, 9, 59, 50);

String getDate = date_format.format(calendar.getTime());

System.out.println(getDate); //輸出2011-07-24 09:59:50;

//比較日前大小;

if(new Date().getTime() > calendar.getTimeInMillis()){

System.out.println("當前日期在后!");

}else{

System.out.println("當前日期在前!");

}

//設置當前時間為:2011-07-24 11:06:00

calendar.setTime(new Date());

int year = calendar.get(Calendar.YEAR); //獲取年;

int month = calendar.get(Calendar.MONTH); //獲取月;

int date = calendar.get(Calendar.DATE); //獲取天;

int hour = calendar.get(Calendar.HOUR); //獲取小時;

int minute = calendar.get(Calendar.MINUTE); //獲取分鐘;

int second = calendar.get(Calendar.SECOND); //獲取秒鐘;

int hour_of_day = calendar.get(Calendar.HOUR_OF_DAY); //第幾個小時，

int day_of_month = calendar.get(Calendar.DAY_OF_MONTH); //這天，在一個月內(nèi)是第幾天.

int day_of_week = calendar.get(Calendar.DAY_OF_WEEK); //這天，在一周內(nèi)，是第幾天.

int day_of_year = calendar.get(Calendar.DAY_OF_YEAR); //這天，在一年內(nèi)，是第幾天。

int week_of_year = calendar.get(Calendar.WEEK_OF_YEAR); //這周，在一年內(nèi)是第幾周;

int week_of_month = calendar.get(Calendar.WEEK_OF_MONTH);//這周，在這個月是第幾周;以以星為標準；

int zone_offset = calendar.get(Calendar.ZONE_OFFSET); //獲取時區(qū);

int day_of_week_in_month = calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH); //某月中第幾周，按這個月1號算，1號起就是第1周，8號起就是第2周。以月份天數(shù)為標準

int r = calendar.get(Calendar.AM_PM);

if(r==calendar.AM){

System.out.println("現(xiàn)在是上午");

}

if(r==calendar.PM){

System.out.println("現(xiàn)在是下午");

}

System.out.println("==================================================");

System.out.println(year);

System.out.println(month);

System.out.println(date);

System.out.println(hour);

System.out.println(minute);

System.out.println(second);

System.out.println(hour_of_day);

System.out.println(day_of_month);

System.out.println(day_of_week);

System.out.println(day_of_year);

System.out.println(week_of_year);

System.out.println(week_of_month);

System.out.println(zone_offset);

System.out.println(day_of_week_in_month);

}

}