How do you subtract Dates in Java?

 

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  • Calculating difference in dates in Java 7 answers

    • It's indeed one of the biggest epic failures in the standard Java API. Have a bit of patience, then you'll get your solution in flavor of the new Date and Time API specified by JSR 310 / ThreeTen which is (most likely) going to be included in the upcoming Java 8.

    Until then, you can get away with JodaTime. 

    DateTime dt1 = new DateTime(2000, 1, 1, 0, 0, 0, 0);
DateTime dt2 = new DateTime(2010, 1, 1, 0, 0, 0, 0);
int days = Days.daysBetween(dt1, dt2).getDays();

    Its creator, Stephen Colebourne, is by the way the guy behind JSR 310, so it'll look much similar.

    您可以使用以下方法： 

    SimpleDateFormat formater=new SimpleDateFormat("yyyy-MM-dd");

long d1=formater.parse("2001-1-1").getTime();
long d2=formater.parse("2001-1-2").getTime();

System.out.println(Math.abs((d1-d2)/(1000*60*60*24)));

    If you deal with dates it is a good idea to look at the joda time library for a more sane Date manipulation model.

    http://joda-time.sourceforge.net/

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