[JAVA]日期比對 CompareTo

Date date1 = sdf.parse("2009-12-31");
Date date2 = sdf.parse("2010-01-31");
 
System.out.println(sdf.format(date1));
System.out.println(sdf.format(date2));
 
if(date1.compareTo(date2)>0){
   System.out.println("Date1 is after Date2");
}else if(date1.compareTo(date2)<0){
   System.out.println("Date1 is before Date2");
}else if(date1.compareTo(date2)==0){
   System.out.println("Date1 is equal to Date2");
}else{
   System.out.println("How to get here?");
}

http://www.mkyong.com/java/how-to-compare-dates-in-java/