It´s posible to change the minimal day in first week of year width the jvm options ?

[gcluis]

By default the Calendar.WEEK_OF_YEAR uses MinimalDaysInFirstWeek = 4.

It´s posible to change the config of the jvm for use always MinimalDaysInFirstWeek = 1 ?

[Tolls]

It's locale based, so you'll want a variant for your locale presumably.
I've not had to faff with that side of things, though.

[gcluis]

I know that can change it in code width:

Calendar a = Calendar.getInstance();
a.setMinimalDaysInFirstWeek(1); // setMinimalDaysInFirstWeek is a non-static funtion

but, Is it possible to change it for all the applications on my server width the jvm optioms?

[masijade]

If there is an option (a documented one anyway) for that it will be, at least referenced, in the API docs, probably in the description for that method you listed. Otherwise, there might be a -X or -XX option that can do this (those are undocumented and were all originally meant only for testing purposes but are, by default, included in the released JVM, kind of like cheat codes in games). Note that these options are not likely to work with IBM's JVM, and possibly not with OpenJDK, and probably not with any other third-party JVM. Google "Java -X min day first week" if you can't find anything in the API docs. Or, write to Oracle support asking about it (and wait a few years for an answer unless you send a check for a few thousand bucks along with it).

[masijade]

Cross-posted just now.

[gcluis]

SOLVED:

In my default Locate:
[español (España)][es_ES]
[minimalDaysInFirstWeek][4]
[firstDayOfWeek][2]

If I change the Locale width:
[español (España)][es]
[minimalDaysInFirstWeek][1]
[firstDayOfWeek][2]

The jvm options:
-Duser.language=es -Duser.country=

[masijade]

So Google helped, I see (or you begged for someone to Google it for you on even more sites). The -D options are not necessary if that is already your "language". Also, don't forget someway to change this on every system you deploy to, and, if the changes where made in the JDK/JRE subdirectories, with every Java upgrade.

[Tolls]

This is what I meant by a variant, though, so you don't change the original Locale file.
This allows you to deploy a variant specific to your application.