package Date;

import org.junit.Test;

import java.util.Calendar;

import java.util.Date;

public class CalendarTest {

@Test

public void testCalendar(){

//实例化

Calendar calendar = Calendar.getInstance();

System.out.println(calendar.getClass());

//常用方法

//get()

int days = calendar.get(Calendar.DAY_OF_MONTH);

System.out.println(days);

//set()

calendar.set(Calendar.DAY_OF_MONTH,24);

days = calendar.get(Calendar.DAY_OF_MONTH);

System.out.println(days);

//add()

calendar.add(Calendar.DAY_OF_MONTH,-4);

days = calendar.get(Calendar.DAY_OF_MONTH);

System.out.println(days);

//getTime():日历类转换为Date

Date date = calendar.getTime();

System.out.println(date);

//setTime（）：Date转换为日历类

Date date1 = new Date();

calendar.setTime(date1);

days = calendar.get(Calendar.DAY_OF_MONTH);

System.out.println(days);

}

}