package com.book.lite;import sun.misc.ClassFileTransformer;import java.util.Calendar;/*** @author zhangyu* @date 2021年08月22日 4:22 下午* java.util.Calender类， 生活中的日历进行对象封装* 1.abstract Calender类* 2.使用子类GregorianCalendar类  数据类型是整数类* 3.获取对象 static Calender getInstance()* 静态方法返回值是Calender类的对象，因为是私有的，返回的是GregorianCalender类对象** 4.Calender类的get（int）返回值是int* 5.Calender类的get（int）传入的参数是Calender类的静态方法** 6.修改日历set（）* 7.setTime() 接收Date对象* 8.setTimeInMillis 接收毫秒值** 9.Calender类的add()方法* add(int filed,int amount)* int amount**/
public class CalenderDemo {public static void main(String[] args) {
//
//        Calendar todat = Calendar.getInstance();
//        printDate(todat);setDate();methon_3();method_4();}public static void printDate(Calendar todat){//  System.out.println(todat);int year = todat.get(Calendar.YEAR);int month = todat.get(Calendar.MONTH);int date = todat.get(Calendar.DATE);int DateOfweek = todat.get(Calendar.DAY_OF_WEEK);int hour = todat.get(Calendar.HOUR_OF_DAY);int minute = todat.get(Calendar.MINUTE);int second = todat.get(Calendar.SECOND);//        System.out.println(year);
//        System.out.println(month+1);
//        System.out.println(date);
//        System.out.println(DateOfweek-1);
//        System.out.println(hour);
//        System.out.println(minute);
//        System.out.println(second);System.out.println(year+"年"+getmonth(month+1)+"月"+date+"日"+" "+getweek(DateOfweek)+"  "+hour+"点"+minute+"分"+second+"秒");}public static String  getweek(int week){String [] str = {"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};return str[week-1];}public static String getmonth(int month){if (month < 10){return "0"+month;}else {return month+"";}}public static void setDate(){Calendar data = Calendar.getInstance();printDate(data);data.set(Calendar.YEAR,2020);data.set(2020,9,23);printDate(data);}public static void methon_3(){Calendar c = Calendar.getInstance();long time = 1234567890234L;c.setTimeInMillis(time);printDate(c);}public static void method_4(){Calendar c = Calendar.getInstance();//定义年份int year = 2008;//日历定位到2008年，3月1日c.set(year,2,1);//向前偏移一天c.add(Calendar.DAY_OF_MONTH,-1);//获取偏移后的天数int date = c.get(Calendar.DAY_OF_MONTH);System.out.println(date);}}