[Bug 320] New: daylight savings time status not reported correctly

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=320

           Summary: daylight savings time status not reported correctly
           Product: IcedTea
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: IcedTea
        AssignedTo: unassigned at icedtea.classpath.org
        ReportedBy: jbezanson at interactivesupercomputing.com


The Date, Calendar, and TimeZone classes say we are not in daylight savings
time, which disagrees with my system setting. This causes Date to report the
time as one hour ago.

The following code:

import java.lang.*;
import java.util.*;
import java.text.*;

public class TimeZoneTest
{
  public static void main(String[] args)
  {
    Date now = new Date();
    SimpleDateFormat df = new SimpleDateFormat("yyyy_MM_dd_HHmm_ss_zzzz");
    System.out.println(df.format(now));
    System.out.println("DST? = "+
                       ((TimeZone.getDefault().inDaylightTime(now)) ?
"yes":"no"));

  }
}

gives this output:

2009_04_17_0948_57_GMT-05:00
DST? = no

while the date command says:

$ date -R
Fri, 17 Apr 2009 10:49:01 -0400

[jbezanson ~/src/scratch]$ java -version
java version "1.6.0_0"
IcedTea6 1.4 (fedora-7.b12.fc10-i386) Runtime Environment (build 1.6.0_0-b12)
OpenJDK Server VM (build 10.0-b19, mixed mode)

On another system, with a different JRE:

2009_04_17_1050_35_Eastern Daylight Time
DST? = yes

[jbezanson at megaro ~]$ java -version
java version "1.6.0_05"
Java(TM) SE Runtime Environment (build 1.6.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 10.0-b19, mixed mode)

To be fair, this is a different system so a hardware difference could be
involved too. But the disagreement with "date" on the same system seems wrong.


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