java 比較時間大小

String s1="2008-01-25 09:12:09";

String s2="2008-01-29 09:12:11";

java.text.DateFormat df=new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

java.util.Calendar c1=java.util.Calendar.getInstance();

java.util.Calendar c2=java.util.Calendar.getInstance();

try

{

c1.setTime(df.parse(s1));

c2.setTime(df.parse(s2));

}catch(java.text.ParseException e){

System.err.println("格式不正確");

}

int result=c1.compareTo(c2);

if(result==0)

System.out.println("c1相等c2");

else if(result<0)

System.out.println("c1小於c2");

else

System.out.println("c1大於c2");