Java计算程序运行时间

Posted 2022-12-13 老王学Java

public class SumTime 

    public static void main(String []args) throws ParseException
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
        String startTime = df.format(new Date());
        System.out.println(startTime);
        System.out.println("12312312312312");
        Date date1 = new Date();
        String endTime = df.format(date1);
        System.out.println(endTime);
//      SumTimes(startTime,endTime);
    

    public  void SumTimes(String startTime,String endTime) throws ParseException
         SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
           Date now = df.parse(startTime);
           Date date=df.parse(endTime);
           long l=now.getTime()-date.getTime();
           long day=l/(24*60*60*1000);
           long hour=(l/(60*60*1000)-day*24);
           long min=((l/(60*1000))-day*24*60-hour*60);
           long s=(l/1000-day*24*60*60-hour*60*60-min*60);
           System.out.println(""+day+"天"+hour+"小时"+min+"分"+s+"秒");