Thank you Stephen for your solution. Does the cvs/svn snapshot support your example ? Is it stable enough and when the next release is planned ? In this case, I will download the latest snapshot.
Moreover, I still reference dates with YearMonthDay, is LocalDate more relevant ? At last, is it necessary to convert days in seconds to operate the division ? Thank you for your support. Richard > -----Message d'origine----- > De : [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] De la > part de Stephen Colebourne > Envoyé : mardi 7 novembre 2006 22:06 > À : Discussion of the Joda project > Objet : Re: [Joda-interest] Need advice - Fractional Periods > > Richard HALLIER wrote: > > My customer asks me for calculating the number of months between 2 > > dates with the following pattern (actually an example): > > > > start date = 17 january 2006 > > end date = 28 april 2006 > > > > The expected result is : > > (31-17+1)/31 (31 days in january) > > + 2 (february and march) > > + (28/30) (30 days in april) > > = 3.42 > > That feels like an unusual calculation design, although I'd > welcome anyone else's comments on the merits of the algorithm. > > Joda-Time, does not really have any support for this at > present. So, you will need to treat the three parts (first > month, in between months, last > month) separately. > > The new Joda-Time 1.4 will contain classes named Days, Hours, > Minutes and Seconds. These may be useful here: > > LocalDate start = new LocalDate(2006, 1, 17); LocalDate > endOfMonth = start.dayOfMonth().withMaximumValue(); > > Days days = Days.daysBetween(firstOfMonth, start); days = > days.plus(1); // needed to to count days inclusively Seconds > secs = days.toStandardSeconds(); > > Days daysInMonth = Days.days(start.dayOfMonth().getMaximumValue()); > Seconds secondsInMonth = daysInMonth.toStandardSeconds(); > > double fractionInMonth = secs.getSeconds() / > secondsInMonth.getSeconds(); > > Although this algorithm could be repeated for each month, it > will be more efficient to only use it on those months which > are fractional. > > > I guess the question for Joda-Time is whether support for decimal > calculations like this is needed. For example, the Days class has a > dividedBy(int) method which returns another Days and uses int > division. > Maybe we should have a dividedBy(Days) that returns a double or a > BigDecimal? > > Stephen > > -------------------------------------------------------------- > ----------- > Using Tomcat but need to do more? Need to support web > services, security? > Get stuff done quickly with pre-integrated technology to make > your job easier > Download IBM WebSphere Application Server v.1.0.1 based on > Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&; > dat=121642 > _______________________________________________ > Joda-interest mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/joda-interest > ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Joda-interest mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/joda-interest
