java:日历

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class Driver {
    public static void main(String[] args) {

        //获取系统剩余的内存空间
        long begin1 = Runtime.getRuntime().freeMemory();
        //获取系统的当前时间
        long start01 = System.currentTimeMillis();

        //当前时间：
        Calendar calendar=Calendar.getInstance();

        System.out.println(calendar.get(Calendar.YEAR));
        System.out.println(calendar.get(Calendar.MONTH));
        System.out.println(calendar.get(Calendar.DAY_OF_MONTH));
        System.out.println(calendar.get(Calendar.DAY_OF_WEEK));
        System.out.println(calendar.get(Calendar.HOUR_OF_DAY));
        System.out.println(calendar.get(Calendar.MINUTE));
        System.out.println(calendar.get(Calendar.SECOND));
        System.out.println(calendar.get(Calendar.MILLISECOND));
        //或者
        System.out.println(calendar.get(14));




        System.out.println("\t\t");
        //获取系统剩余的内存空间
        long end2 = Runtime.getRuntime().freeMemory();
        //获取系统的当前时间  单位是毫秒
        long finish02 = System.currentTimeMillis();
        System.out.println("本程序占用内存:" + (begin1 - end2));
        System.out.println("本程序占用时间:" + (finish02 - start01));
    }
}