比较当前时间和给定时间大小

import java.io.*;import java.util.Date;import java.text.SimpleDateFormat; import java.text.DateFormat;class test  {public static void main (String[] args) throws java.lang.Exception{        Date now = new Date();        String a = "2016-07-06 14:30:00";               SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm");        Date dt1 = df.parse(a);System.out.println(dt1.getTime());System.out.println(now.getTime());if (dt1.getTime() > now.getTime()){            System.out.println("aaa");        }}}