Java 日期类 Calendar

package com.xuyigang1234.chp05.sec01;
import java.util.Calendar;;
public class TestCalendar {
    public static void main(String[] args) {
        Calendar cal = Calendar.getInstance();
        System.out.println("现在是："+cal.get(Calendar.YEAR)+"年"
                +(cal.get(Calendar.MONTH)+1)+"月"
                +cal.get(Calendar.DAY_OF_MONTH)+"日"
                +cal.get(Calendar.HOUR_OF_DAY)+"时"
                +cal.get(Calendar.MINUTE)+"分"
                +cal.get(Calendar.SECOND)+"秒");
    //今天星期几
        System.out.println(cal.get(Calendar.DAY_OF_WEEK));
        System.out.println(cal.get(Calendar.DAY_OF_MONTH));
        String[] weekDays = {"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
        System.out.println("今天是："+weekDays[cal.get(Calendar.DAY_OF_WEEK)-1]);
        
        
    }
}

现在是：2018年11月22日21时43分34秒
5
22
今天是：星期四