Calendar

package DateProject;
/**
 * 测试日历类
 * 一月份为0，二月份为1
 * 周日为1，周一为2
 * @author 4090039qrh
 *
 */
import java.util.Date;
import java.util.Calendar;
import java.util.GregorianCalendar;

public class TestCanlendar {
    public static void main(String[] args) {
        
        Calendar c=new GregorianCalendar();
        
        //设置Calendar的年月日  c.set()
        
       //设置方法1
        c.set(2020,1,20,12,23,34);
        
        //设置方法2
        c.set(Calendar.YEAR,2019);
        c.set(Calendar.MONTH,1);
        c.set(Calendar.DATE, 28);//日 DATE
        c.set(Calendar.HOUR_OF_DAY,8);//小时 HOUR_OF_DAY
        c.set(Calendar.MINUTE,9);
        c.set(Calendar.SECOND,2);
        c.set(Calendar.DAY_OF_WEEK,4);//星期几 DAY_OF_WEEK
        
        
        //获取Calendar的年月日 c.get()
        
        System.out.println(c.get(Calendar.YEAR));
        System.out.println(c.get(Calendar.MONTH));
        System.out.println(c.get(Calendar.DATE));
        System.out.println(c.get(Calendar.HOUR_OF_DAY));
        System.out.println(c.get(Calendar.MINUTE));
        System.out.println(c.get(Calendar.SECOND));
        System.out.println(c.get(Calendar.DAY_OF_WEEK));
        
        
        
        //Canlendar-->Date c.getTime()        
        Date date=c.getTime();
        System.out.println(date);//Thu Feb 28 12:23:34 CST 2019
        
        //Date-->Calendar c.setTime()
        Date date1=new Date(1987600000);
        c.setTime(date1);
        System.out.println(c.get(Calendar.YEAR));//1970
        
        //测试日期计算 add
        c.add(Calendar.YEAR, 20);
        c.add(Calendar.YEAR, -20);
        System.out.println(c.get(Calendar.YEAR));//1970
        
        

    }

}