Timezone issue in Blackberry - blackberry

Question

I am working on a project which requires me to create a Date value by setting it to a particular timezone .
I have used the following code
Date formatter1 = new Date(HttpDateParser.parse("2013-08-02 11:00:00"));
System.out.println("Date dd formatter1"+formatter1);
Result as follows:
Fri Aug 02 16:30:00 Asia/Calcutta 2013
After parsing, it is giving me time according to device time zone ...
adding 5:30 automatically if device time zone is set to India Kolkata.
I want result to be as :
Fri Aug 02 11:00:00 Asia/Calcutta 2013
I mean it should not add the offset as reference to GMT .
How could I work upon this code to set the data required to me as per the Timezone and not change it internally ?

Answer 1

One problem is that your original date string:
2013-08-02 11:00:00
does not include time zone information. So, it is being interpreted as a GMT time. Which then means that, displayed in Calcutta time, it will be
Fri Aug 02 16:30:00 Asia/Calcutta 2013
You want to specify that 11:00 is already in Calcutta time. To do that, use one of the formats defined in the HttpDateParser documentation:
// we make sure to specify time zone information "+05:30"!
long timeSinceEpoch = HttpDateParser.parse("2013-08-02T11:00:00+05:30");
Date date = new Date(timeSinceEpoch);
System.out.println("Date: " + date);
// use this to slightly change the date formatting ... same time zone
String pattern = "yyyy-MM-dd hh:mma";
SimpleDateFormat formatter = new SimpleDateFormat(pattern);
String formattedDate = formatter.formatLocal(timeSinceEpoch);
System.out.println("SimpleDateFormat: " + formattedDate);
Note: that in addition to adding "+5:30" to the time string, you have to replace a space after the date with a 'T'.
This code will output:
[0.0] Date: Fri Aug 02 11:00:00 Asia/Calcutta 2013
[0.0] SimpleDateFormat: 2013-08-02 11:00am
if the device's time zone is actually set to Calcutta (Kolkata +5.5).
References
Have a look at this answer on Stack Overflow.
and maybe this one, too.