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List:       icu4j-discussion
Subject:    Re: [ICU4J-discussion] Re: Japanese ERA in
From:       Alan Liu <alansliu () yahoo ! com>
Date:       2001-12-12 0:19:13
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Hi Ira,

A few comments.  First of all, the factory method does not yet return any traditional \
calendars.  So getInstance(LOCALE) only returns a GregorianCalendar parameterized for \
that locale, in terms of the first day of the week and so on.  In order to get a \
Japanese calendar, you need to instantiate one directly.  In the future, you should \
be able to do something like this:

   Calendar cal = Calendar.getInstance(Calendar.TRADITIONAL, Locale.Japan);

  -or-

   Calendar cal = Calendar.getInstance(Calendar.MODERN, Locale.Japan);

but this isn't implemented yet.

Second, JapaneseCalendar.HEISEI is a field value for the ERA field, not an field \
number.  Because of the loose typing in Calendar, this kind of error is inevitable.

And finally, there are probably bugs in JapaneseCalendar -- this class is still under \
development.  The following source is closer to what you want:

        Calendar cal = new JapaneseCalendar(Locale.JAPAN);
        for (int i = 1; i < 10; i++) {
            cal.add(Calendar.ERA, -1);
            System.out.println(cal.get(Calendar.ERA) + ":" +
                               cal.getTime());
        }

but it still may not give you exactly the results you expect.

Please file bugs about all this (so it gets fixed).

Alan Liu
IBM

At 10:20 PM 12/2/2001 -0800, Ira Waxberg wrote:
> Nope, Hesei is a constant for the era starting in 
> 1989. Nothing seems to change the ERA field; Example:
> 
> import ibm.util.*;
> Calendar cal = new Calendar.getInstance();
> System.out.println(cal.get(JapaneseCalendar.ERA));
> calendar.set(JapaneseCalendar.ERA, JapaneseCalendar, 
> TAISHO);
> System.out.println(cal.get(JapaneseCalendar.ERA));
> 
> Ouput:
> 1
> 1
> 
> Ira
> 
> ---- Ira Waxberg <ira@waxberg.com> wrote:
> > My previous post was misleading. I am really trying 
> > to get the Hesei field from the Japanese calendar. 
> > When I try to get or set this field in 
> > com.ibm.util.JapaneseCalendar, I get an 
> > ArrayIndexOutOfBoundsException. I noticed that when 
> I 
> > called getInstance() on 
> com.ibm.util.JapaneseCalendar 
> > I got a GregorianCalendar returned as a 
> > com.ibm.util.Calendar, so I see why this wouldn't 
> > work. Anyone know what's going on here?
> > 
> > Ira
> > 
> > ------------- Original Post ----------------
> > 
> > Changing the ERA field in the icu4j Calendar seems 
> to 
> > have no effect on the field value. Am I doing 
> > something wrong here?
> > 
> > com.ibm.util.Calendar cal = 
> > com.ibm.util.Calendar.getInstance
> > (java.util.Locale.JAPAN);
> > for (int i = 1; i < 10; i++)
> > {
> > cal.add(com.ibm.util.Calendar.ERA, -1);
> > System.out.println(cal.get
> > (com.ibm.util.Calendar.ERA));
> > }
> > 
> > Your help is appreciated, 
> > 
> > 
> > ---------------
> > ira@waxberg.com
> > 
> > 
> 
> ---------------
> ira@waxberg.com
> _______________________________________________
> ICU4J-discussion mailing list
> ICU4J-discussion@www-124.ibm.com
> http://www-124.ibm.com/developerworks/oss/mailman/listinfo/icu4j-discussion


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