Name: bsC130419 Date: 05/16/2001


$ java -version
java version "1.3.0_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0_02)
Java HotSpot(TM) Client VM (build 1.3.0_02, mixed mode)


Calling Calendar.add for sub-hour fields, during the first occurence of the
doubled time during a daylight-savings-time transition, yields the incorrect
resulting time, if the time fields are recalculated.

Sample source code:

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

public class TestDST {
  public static void main(String[] argv) {
    DateFormat df = DateFormat.getDateTimeInstance(DateFormat.FULL,
                                                   DateFormat.FULL);
    df.setTimeZone(TimeZone.getTimeZone("America/New_York"));

    Calendar now =
      new GregorianCalendar(TimeZone.getTimeZone("America/New_York"));

    now.setTime(new Date(877843800000L));
    // Sunday, October 26, 1997 1:30:00 AM EDT

    System.out.println(df.format(now.getTime()));
    System.out.println(now.getTime().getTime());

    now.clear(Calendar.WEEK_OF_YEAR); // force fields to be cleared

    now.add(Calendar.SECOND, -1);

    System.out.println(df.format(now.getTime()));
    System.out.println(now.getTime().getTime());
  }
}

Observed output:
$ java TestDST
Sunday, October 26, 1997 1:30:00 AM EDT
877843800000
Sunday, October 26, 1997 1:29:59 AM EST
877847399000

Expected output:
Sunday, October 26, 1997 1:30:00 AM EDT
877843800000
Sunday, October 26, 1997 1:29:59 AM EDT
877843799000
(Review ID: 124505)
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