getDisplayName problem in ICU4J

A message from Kenchan in icu-support ML :

Hi,
 
The ICU4J 4.0 API getDisplayName() for a timezone does not display the correct
daylight long name, when the requested TimeZone is not in DST at present.
Instead, the resulting output we get is the display name of the timezone of
the machine. This was working fine before 2nd Nov,2008 for “America/Los_Angeles”
as DST was on before. 
Please find below the code snippets and the corresponding results.
 
ULocale locale = new ULocale(“en”);
TimeZone tz = TimeZone.getTimeZone("America/Los_Angeles");
String displayName0 = tz.getDisplayName(true, 1, locale); // Daylight Long
System.out.println("Daylight long: "+ displayName0);
 
OUTPUT: 
Daylight long: India Standard Time    
EXPECTED :
Daylight long: Pacific Daylight Time  
 
However, if the standard time zone name is requested before the daylight name, the result is correct.
 
ULocale locale = new ULocale(“en”);
TimeZone tz = TimeZone.getTimeZone("America/Los_Angeles");
String displayName0 = tz.getDisplayName(false, 1, locale); // Standard Long
String displayName0 = tz.getDisplayName(true, 1, locale); // Daylight Long
System.out.println("Daylight long: "+ displayName0);
 
OUTPUT:
Daylight long: Pacific Daylight Time
EXPECTED:
Daylight long: Pacific Daylight Time
 
I am able to achieve the correct results by making the following change in TimeZone.java :
When the timezone is not currently in DST, July1 date is created. After this
we need to set the timezone to the requested Timezone.
I have highlighted the else block, which I added to the implementation of getdisplayname().
 
if (daylight && useDaylightTime()) {
                // The display name for daylight saving time was requested, but currently not in DST
 
                // Set a fixed date (July 1) in this Gregorian year
                GregorianCalendar cal = new GregorianCalendar(this);
                cal.set(Calendar.MONTH, Calendar.JULY);
                cal.set(Calendar.DATE, 1);
 
                // Get July 1 date
                d = cal.getTime();
 
                // Check if it is in DST
                if (cal.get(Calendar.DST_OFFSET) == 0) {
                    // We need to create a fake time zone
                    tz = new SimpleTimeZone(offsets[0], getID(),
                            Calendar.JUNE, 1, 0, 0,
                            Calendar.AUGUST, 1, 0, 0,
                            getDSTSavings());
                    format.setTimeZone(tz);
                }
                
                else {
                            format.setTimeZone(this);
                           }
            }
 
Please let me know if this is a known issue and if the above resolution is fine.
 
Thanks,
Kanchan

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