Java已知时间和系统当前时间比较的最佳实现

给定一个时间与当前时间比大小的最佳实现


import java.util.*;
import java.text.* ;

public class date{

public static void main(String[] args){

        Date currentTime = new Date();
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String date1 = formatter.format(currentTime);

        String date2 = "2010-8-12 15:23:11";
        boolean isbefore = isDateBefore(date1,date2);
        boolean isafter = isDateAfter(date1,date2);
    
        if(isbefore)
         {
            System.out.println("isbefore:"+date1+"<"+date2);
         }
        if(isafter)
         {
            System.out.println("isafter:"+date1+">"+date2);
         }

        else
         {
             System.out.println("错误！");
         }
}
    public static boolean isDateBefore(String date1,String date2){
       try{
        DateFormat df = DateFormat.getDateTimeInstance();
        return df.parse(date1).before(df.parse(date2));
       }catch(ParseException e){
           System.out.println( e.getMessage());
        return false;
       }
    }

    public static boolean isDateAfter(String date1,String date2){
       try{
        DateFormat df = DateFormat.getDateTimeInstance();
        return df.parse(date1).after(df.parse(date2));
       }catch(ParseException e){
           System.out.println( e.getMessage());
        return false;
       }
    }

}