Date类

package ch3;import java.text.SimpleDateFormat;import java.util.*;import java.util.Date;public class DateText {public static void main(String[] args) {long time =System.currentTimeMillis();System.out.println("从1970年00:00:00已经过去："+time+"s");Date date =new Date();SimpleDateFormat sdf =new SimpleDateFormat("yyyy:MM:dd  EEE HH:mm:ss");String str =sdf.format(date);System.out.println(str);}}