Question

  private String target_time_zone = "Australia/Hobart";
  private String format    = "MM/dd/yyyy HH:mm:ss z";


  public static void main(String args[]) throws ParseException {

        Date date = Calendar.getInstance().getTime();
        TZFormat tzFormat = new TZFormat();
        System.out.println("Converted TZ Date: "+ tzFormat.TZF(date));



  }

  public Date TZF(Date dt) throws ParseException {

        TimeZone tz = TimeZone.getTimeZone(target_time_zone);     
        SimpleDateFormat date_format_gmt = new SimpleDateFormat(format);
        date_format_gmt.setTimeZone(tz);
        SimpleDateFormat date_format_gmt1 = new SimpleDateFormat(format);
        date_format_gmt1.setTimeZone(tz);

        System.out.println("formated value: "+ date_format_gmt.format(dt));


       return date_format_gmt1.parse(date_format_gmt.format(dt));
  }

OUTPUT:

formated value: 11/15/2012 03:16:11 EST
Converted TZ Date: Wed Nov 14 21:46:11 IST 2012

Actually my requirement is i want to convert the date to the target_time_zone timeZone with the format and return back the converted Date.

 private String target_time_zone = "Australia/Hobart";
 private String format     = "MM/dd/yyyy HH:mm:ss z";

here want happens is in TZF method formated date_format_gmt.format(dt) is formated the date to my given TimeZone when we parse that value it is showing previous value (actual time).

how to get the Date object with selected Time Zone.

Answer 1

Date object always represents time in milliseconds (epoch time), it doesn’t contain any timezone information. When you format and make it as String, then only it prints in required format with specified timezone.