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  1. JDK
  2. JDK-8033681

(fmt) Bad time zone in date output through Formatter

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P4
    • Resolution: Won't Fix
    • Affects Version/s: 6u33
    • Fix Version/s: None
    • Component/s: core-libs
    • Labels:

      Description

      FULL PRODUCT VERSION :
      java version " 1.6.0_33 "
      Java(TM) SE Runtime Environment (build 1.6.0_33-b03)
      Java HotSpot(TM) 64-Bit Server VM (build 20.8-b03, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows [Version 6.1.7601]

      A DESCRIPTION OF THE PROBLEM :
      When formatting dates through java.util.Formatter, different results are obtained for time zone in CEST when formatting as %tz and %tZ.
      The following code:

      java.util.Date d = new java.util.Date();
      System.out.println(d);
      System.out.format( " %1$tF T %1$tT %1$tz %n " , d);
      System.out.format( " %1$tF T %1$tT %1$tZ %n%n " , d);
      java.util.Formatter f = new java.util.Formatter(System.out);
      f.format( " %1$tF T %1$tT %1$tz %n " , d);
      f.format( " %1$tF T %1$tT %1$tZ %n%n " , d);
      System.out.println(String.format( " %1$tF T %1$tT %1$tz " , d));
      System.out.println(String.format( " %1$tF T %1$tT %1$tZ %n " , d));

      Results in:

      Tue Oct 09 17:36:52 CEST 2012
      2012-10-09 T 17:36:52 +0100
      2012-10-09 T 17:36:52 CEST

      2012-10-09 T 17:36:52 +0100
      2012-10-09 T 17:36:52 CEST

      2012-10-09 T 17:36:52 +0100
      2012-10-09 T 17:36:52 CEST

      The offsets +01:00 are wrong for CEST time zone which is +02:00.

      I think this is a bug. Wikipedia mentiones ISO 8601 (http://en.wikipedia.org/wiki/ISO_8601#Time_offsets_from_UTC) where it says that numerical offsets account for DST differences.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Tue Oct 09 17:36:52 CEST 2012
      2012-10-09 T 17:36:52 +0200
      2012-10-09 T 17:36:52 CEST

      2012-10-09 T 17:36:52 +0200
      2012-10-09 T 17:36:52 CEST

      2012-10-09 T 17:36:52 +0200
      2012-10-09 T 17:36:52 CEST
      ACTUAL -
      Tue Oct 09 17:36:52 CEST 2012
      2012-10-09 T 17:36:52 +0100
      2012-10-09 T 17:36:52 CEST

      2012-10-09 T 17:36:52 +0100
      2012-10-09 T 17:36:52 CEST

      2012-10-09 T 17:36:52 +0100
      2012-10-09 T 17:36:52 CEST


      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      java.util.Date d = new java.util.Date();
      System.out.println(d);
      System.out.format( " %1$tF T %1$tT %1$tz %n " , d);
      System.out.format( " %1$tF T %1$tT %1$tZ %n%n " , d);
      java.util.Formatter f = new java.util.Formatter(System.out);
      f.format( " %1$tF T %1$tT %1$tz %n " , d);
      f.format( " %1$tF T %1$tT %1$tZ %n%n " , d);
      System.out.println(String.format( " %1$tF T %1$tT %1$tz " , d));
      System.out.println(String.format( " %1$tF T %1$tT %1$tZ %n " , d));

      ---------- END SOURCE ----------

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            Assignee:
            rpatil Ramanand Patil
            Reporter:
            webbuggrp Webbug Group
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              Dates

              Created:
              Updated:
              Resolved: