时间类型比较
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public static void main(String args[]){SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Calendar c1=Calendar.getInstance();Calendar c2=Calendar.getInstance();try {c1.setTime(formatter.parse("2009-10-24 12:55:55"));c2.setTime(formatter.parse("2009-10-25 12:55:55"));} catch (ParseException e) {e.printStackTrace();}// -1表示c1小于c2int result=c1.compareTo(c2);System.out.println(result);}

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