看了视频好像还是不太懂啊

Date a = new date ();

long time = System.currentTimeMillis();//获取当前时间的毫秒值
Date d =new Date(time);//根据毫秒值来获取日期对象

public class DateTest {
public static void main(String[] args) {
        Date d = new Date();
        int years = d.getYear();
        int month = d.getMonth();
        int day = d.getDay();
        System.out.println("今天是:"+years+"年"+month+"月"+day+"日");
}
}