计算北京奥运会举办日与现在相隔的时间？

Question

import java.util.Calendar;
import java.text.ParseException;
import java.util.Date;
public class second {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
String  oldDateStr="2008-08-08";
Calendar calendar=Calendar.getInstance();
calendar.setTime(oldDateStr);
int oldYear=calendar.get(Calendar.YEAR);
int oldMonth=calendar.get(Calendar.MONTH)+1;
Date currentDate=new Date();
calendar.clear();
calendar.setTime(currentDate);
int year=calendar.get(Calendar.YEAR);
int month=calendar.get(Calendar.MONTH)+1;
int day=calendar.get(Calendar.DAY_OF_MONTH);
int l = (int) (calendar.getTime() - oldDateStr.getTime()) / (1000 * 24 * 60 * 60);
System.out.println(oldDateStr+"与今天"+calendar+"相差了"+l+"天");
    }

}
 

Answer 1

public static void main(String[] args) throws Exception{

        
        String  oldDateStr="2008-08-08";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Date d = sdf.parse(oldDateStr);
        Date curDate=new Date();
        int days = (int) ((curDate.getTime() - d.getTime()) / (24*60*60*1000));
        System.out.println(oldDateStr+"与今天"+sdf.format(d)+"相差了"+days+"天");
    }