java DateTime计算宝宝从出生到现在的时间

import java.util.Scanner;  
import org.joda.time.DateTime;  
import org.joda.time.Days;  
import org.joda.time.LocalDate;  
import org.joda.time.format.DateTimeFormat;  
import org.joda.time.format.DateTimeFormatter;  
  
public class CalBabyJoda {  
      
    private final static String birthday = "2012-3-10 08:20:55";  
  
    public static void main(String[] args) {  
        while(true){  
            Scanner s = new Scanner(System.in);  
            System.out.println("########################################");  
            DateTimeFormatter format1 = DateTimeFormat .forPattern("yyyy-MM-dd HH:mm:ss");  
            DateTimeFormatter format2 = DateTimeFormat .forPattern("yyyy-MM-dd");  
            DateTime startDateTime = DateTime.parse(birthday, format1);  
            System.out.println("宝宝来到这个世界已经");  
            calDateToDay(startDateTime,new DateTime());  
            System.out.println("如选择其它日期请输入(格式例如:2012-11-08 14:24:54或着2012-11-08)");  
            System.out.println("########################################");  
            String endDate = s.nextLine();  
            DateTime endDateTime = null;  
            try{  
                endDateTime = DateTime.parse(endDate,format1);  
            }catch(Exception e){  
                try{  
                    endDateTime = DateTime.parse(endDate,format2);  
                }catch(Exception e1){  
                    System.out.println("输入格式错误!请重新输入.");  
                    continue;  
                }  
            }  
            System.out.println("宝宝从出生到" + endDateTime.toString("yyyy-MM-dd HH:mm:ss") + "已经");  
            calDateToDay(startDateTime,endDateTime);  
        }  
    }  
      
    public static void calDateToDay(DateTime startDateTime,DateTime endDateTime){  
          
         LocalDate start=new LocalDate(startDateTime);    
        LocalDate end=new LocalDate(endDateTime);  
        Days days = Days.daysBetween(start, end);  
        int intervalDays = days.getDays();  
        int intervalHours = endDateTime.getHourOfDay() - startDateTime.getHourOfDay();  
        int intervalMinutes = endDateTime.getMinuteOfHour() - startDateTime.getMinuteOfHour();  
        int intervalSeconds = endDateTime.getSecondOfMinute() - startDateTime.getSecondOfMinute();  
          
          
        if(intervalSeconds < 0){  
            intervalMinutes = intervalMinutes -1;  
            intervalSeconds = 60 + intervalSeconds;  
        }  
          
        if(intervalMinutes < 0){  
            intervalHours = intervalHours -1;  
            intervalMinutes = 60 + intervalMinutes;  
        }  
          
        if(intervalHours < 0){  
            intervalDays = intervalDays -1;  
            intervalHours = 24 + intervalHours;  
        }  
                  
        System.out.println(intervalDays + "天" + intervalHours +   
                "小时" + intervalMinutes + "分钟" + intervalSeconds + "秒");  
        System.out.println("############################");  
    }  
  
}