package?com.imooc6;
import?java.text.ParseException;
import?java.text.SimpleDateFormat;
import?java.util.Calendar;import?java.util.Date;???
/**????*?????*?java.util.Calendar?類是一個抽象類，可以通過調用?getInstance()????
*?靜態方法獲取一個?Calendar?對象，此對象已由當前日期時間初????
*?始化，即默認代表當前時間，如?Calendar?c?=?Calendar.getInstance();????
*?Calendar?c=Calendar.getInstance();//創建Calendar對象????
*?int?year=c.get(Calendar.YEAR);//獲取年????
*?int?month=c.get(Calendar.MONTH)+1;//獲取月，0表示1月份????
*?int?day=c.get(Calendar.DAY_OF_MONTH);//獲取日期????
*?int?hour=c.get(Calendar.HOUR_OF_DAY);//獲取小時????
*?int?minute=c.get(Calendar.MINUTE);//獲取分鐘????
*?int?second=c.get(Calendar.SECOND);//獲取秒???
?*?????
*?System.out.println("當前時間："+year+"-"+month+"-"+day+"?"+hour+":"????
*????????????????????+minute+":"+second);???
?*?????
?*?其中，調用?Calendar?類的?getInstance()?方法獲取一個實例，然???
??*?后通過調用?get()?方法獲取日期時間信息，參數為需要獲得的字段????
??*?的值，?Calendar.Year?等為?Calendar?類中定義的靜態常量。????
??*?????
??*?????
??*?Calendar?類提供了?getTime()?方法，用來獲取?Date?對象，????
??*?完成?Calendar?和?Date?的轉換，還可通過?getTimeInMillis()?方法，???
??*?獲取此?Calendar?的時間值，以毫秒為單位????
??*?Date?d=c.getTime();????
??*?Long?time=c.getTimeInMills();????
??*?System.out.println("當前時間："+d);????
??*?System.out.println("當前毫秒數："+time);????
??*?????
??*?????
??*?@author?Administrator???
???*????
???*/public?class?CalendarLianxi?{	
???/**	
???*?@param?args	
???*/	
???public?static?void?main(String[]?args)?{		
???//?TODO?Auto-generated?method?stub				
???//?創建Calendar對象		
???Calendar?c?=?Calendar.getInstance();				
???int?year=c.get(Calendar.YEAR);		
???int?month=c.get(Calendar.MONTH)+1;		
???int?day=c.get(Calendar.DAY_OF_MONTH);		
???int?hour=c.get(Calendar.HOUR_OF_DAY);		
???int?minute=c.get(Calendar.MINUTE);		
???int?second=c.get(Calendar.SECOND);				
???System.out.println("當前時間："+year+"-"+month+"-"+day+"?"+hour+":"		
???	??????????????????+minute+":"+second);						????????		
???	??????????????????//?將Calendar對象轉換為Date對象		
???	??????????????????Date?date?=?c.getTime();???????
???	???????????????????Long?time=c.getTimeInMillis();		
???	???????????????????//?創建SimpleDateFormat對象，指定目標格式		
???	???????????????????SimpleDateFormat?sdf?=?new?SimpleDateFormat("yyyy-MM-dd?HH:mm:ss");????????		
???	???????????????????//?將日期轉換為指定格式的字符串		
???	???????????????????String?now?=?sdf.format(date);		
???	???????????????????System.out.println("當前時間："?+?now);		
???	???????????????????System.out.println(time);				
???	???????????????????String?a="2000年01月01日?01時:01分:01秒";		
???	???????????????????SimpleDateFormat?ssdf?=?new?SimpleDateFormat("yyyy-MM-dd?HH:mm:ss");		
???	???????????????????//SimpleDateFormat?ssdf1=?new?SimpleDateFormat("yyyy-MM-dd?HH:mm:ss");		
???	???????????????????try?{			Date?da=ssdf.parse(a);			
???	??????????????????????????????????//String?stt=ssdf1.format(da);			
???	????????????????????????//System.out.println(stt);			
???	????????????????????????c.setTime(da);			
???	????????????????????????Long?time1=c.getTimeInMillis();			
???	????????????????????????System.out.println(time1);			
???	????????????????????????System.out.println(time-time1);		
???	????????????????????????}?catch?(ParseException?e)?{		
???	????????????????????????	//?TODO?Auto-generated?catch?block			
???	????????????????????????	e.printStackTrace();			
???	????????????????????????	System.out.println("數據有問題");	
???	????????????????????????		}						
???	????????????????????????			}}

昨天運行還是沒問題，今天運行就有問題了！