Java packages for calendars?

[Tom Peters-6]

Can anyone recommend a Java package for calendar computations and  
conversions and extension?  The standard java.util.Calendar is of  
course inadequate and too much Gregorian.  I have the package that  
Hannu Väisänen posted a few years ago (http://joyds1.joensuu.fi/ 
calendar/index.html).  It is very extensive (maybe more than I need),  
but ageing (2005) and it does not compile rightaway so would need a  
lot of work.

--
Tom Peters

[Karl Palmen]

Dear Tom and Calendar People

Tom had somehow got a space character in the link
http://joyds1.joensuu.fi/calendar/index.html 

now the link works.

The package would be more useful if it implemented the java.util.Calendar interface.

Karl

10(14(11

-----Original Message-----
From: East Carolina University Calendar discussion List [mailto:CALNDR-L@...] On Behalf Of Tom Peters
Sent: 26 October 2009 21:45
To: CALNDR-L@...
Subject: Java packages for calendars?

Can anyone recommend a Java package for calendar computations and  
conversions and extension?  The standard java.util.Calendar is of  
course inadequate and too much Gregorian.  I have the package that  
Hannu Väisänen posted a few years ago (http://joyds1.joensuu.fi/ 
calendar/index.html).  It is very extensive (maybe more than I need),  
but ageing (2005) and it does not compile rightaway so would need a  
lot of work.

--
Tom Peters

--
Scanned by iCritical.

[Hannu Väisänen]

> I have the package that  
> Hannu Väisänen posted a few years ago (http://joyds1.joensuu.fi/ 
> calendar/index.html).  It is very extensive (maybe more than I need),  
> but ageing (2005) and it does not compile rightaway so would need a  
> lot of work.

What error message(s) do you get? Maybe I release a new version of the
package. (-:

[Tom Peters-6]

>-- Oorspronkelijk bericht --
>Date:         Thu, 29 Oct 2009 15:11:33 +0200
>Reply-To:     East Carolina University Calendar discussion List

>    <CALNDR-L@...>
>From:         Hannu Väisänen <hvaisane@...>
>Subject: Re: Java packages for calendars?
>To:           CALNDR-L@...
>
>
>> I have the package that
>> Hannu Väisänen posted a few years ago (http://joyds1.joensuu.fi/
>> calendar/index.html).  It is very extensive (maybe more than I need),

>
>> but ageing (2005) and it does not compile rightaway so would need a
>> lot of work.
>
>What error message(s) do you get? Maybe I release a new version of the
>package. (-:

I imported the packages into Eclipse.  When validating, I got 1707 warnings.
 Warnings are things like:
"The serializable class ArmenianCalendar does not declare a static final
serialVersionUID field of type long"

Also some errors at build&run, apparently Eclipse does not like that a class
A exists in a package that is not called "a".

[OvV_HN]

----- Original Message -----
From: "Hannu Väisänen" <hvaisane@...>
To: <CALNDR-L@...>
Sent: Thursday, October 29, 2009 2:11 PM
Subject: Re: Java packages for calendars?


>> I have the package that
>> Hannu Väisänen posted a few years ago (http://joyds1.joensuu.fi/
>> calendar/index.html).  It is very extensive (maybe more than I need),
>> but ageing (2005) and it does not compile rightaway so would need a
>> lot of work.
>
> What error message(s) do you get? Maybe I release a new version of the
> package. (-:
>

Another point of consideration:
The Väisänen routines are partly based on GNU Emacs.
I don't know how up to date the GNU Emacs calendar routines are, but if they
are the same as the original Reingold routines from the eighties, then an
update really should be considered.

Oscar van Vlijmen

[Edward M. Reingold]

> The Väisänen routines are partly based on GNU Emacs.
> I don't know how up to date the GNU Emacs calendar routines are, but if they
> are the same as the original Reingold routines from the eighties, then an
> update really should be considered.

My GNU Emacs code has not ever been revised; but it is the only code freely
distributed under the GNU license.  The code from CC is much better, but
requires a license for for-profit use (it is freely available for non-profit
use).

[Hannu Väisänen]

On Thu, Oct 29, 2009 at 03:20:54PM +0100, Tom Peters wrote:
> I imported the packages into Eclipse.  When validating, I got 1707 warnings.
>  Warnings are things like:
> "The serializable class ArmenianCalendar does not declare a static final
> serialVersionUID field of type long"

Unfortunately I can not help you since I don't use Eclipse.


> Also some errors at build&run, apparently Eclipse does not like that a class
> A exists in a package that is not called "a".

Huh? Do you mean 'a class A exists in a FILE that is not called "a"'?

Are you on Windows?

On Linux, a class A must be in a file named A.java; i.e. names
are case-sensitive.

[Irv Bromberg]

On 2009 Oct 30, at 06:07 , Hannu Väisänen wrote:

Unfortunately I can not help you since I don't use Eclipse.

I don't use it either, but anyhow Eclipse is free, open source, and downloadable from <http://www.eclipse.org/>.

-- Irv Bromberg, Toronto, Canada

<http://www.sym454.org/>

[Tom Peters-6]

Op 29-okt-2009, om 13:39 heeft Karl Palmen het volgende geschreven:

> Dear Tom and Calendar People
>
> Tom had somehow got a space character in the link
> http://joyds1.joensuu.fi/calendar/index.html

That was your mail program wrapping the message to a short linelength.

> now the link works.
>
> The package would be more useful if it implemented the  
> java.util.Calendar interface.

That interface requires the definition of fields like JANUARY and  
Gregorian-related methods for all classes that implement it, which  
makes no sense for a general calendar.  Like I wrote, too Gregorian-
centric.

> Karl
>
> 10(14(11

> -----Original Message-----
> From: East Carolina University Calendar discussion List  
> [mailto:CALNDR-L@...] On Behalf Of Tom Peters
> Sent: 26 October 2009 21:45
> To: CALNDR-L@...
> Subject: Java packages for calendars?
>
> Can anyone recommend a Java package for calendar computations and
> conversions and extension?  The standard java.util.Calendar is of
> course inadequate and too much Gregorian.  I have the package that
> Hannu Väisänen posted a few years ago (http://joyds1.joensuu.fi/
> calendar/index.html).  It is very extensive (maybe more than I need),
> but ageing (2005) and it does not compile rightaway so would need a
> lot of work.
>
> --
> Tom Peters

--
Tom Peters