Name: nl37777 Date: 09/29/98


The Calendar.setTimeZone does not update all of
the fields in the Calendar object.

Notice in the output below that when a Calendar
created with a PST timezone is converted to the
EST timezone, the ERA,YEAR,MONTH,WEEK_OF_YEAR,
WEEK_OF_MONTH,DAY_OF_MONTH,DAY_OF_YEAR,DAY_OF_WEEK,
DAY_OF_WEEK_IN_MONTH,AM_PM,HOUR,HOUR_OF_DAY,MINUTE,
SECOND,MILLISECOND,ZONE_OFFSET and DST_OFFSET
values are not updated.

This causes the Calendar.get(field) to return the
incorrect values

Here's a sample program to illustrate the bug.

import java.io.*;
import java.util.*;


public class datebug
{

  public static void main(String argv[])
  {
    Calendar caltmp = Calendar.getInstance();
    Calendar calEST = Calendar.getInstance(TimeZone.getTimeZone("EST"));
    Calendar calPST = Calendar.getInstance(TimeZone.getTimeZone("PST"));

    caltmp.set(1998,8,28,23,0,0); // Set the time

    Date date = caltmp.getTime(); // Create a date object

    System.out.println("Date : " + date);

    calEST.setTime(date);
    calPST.setTime(date);

    System.out.println("calEST Date : " + calEST.getTime() );
    System.out.println("calPST Date : " + calPST.getTime() );

    System.out.println("\ncalEST Calendar");
    System.out.println(calEST);

    System.out.println("\ncalPST Calendar");
    System.out.println(calPST);

    System.out.println("\nConvert PST to EST");

    calPST.setTimeZone(TimeZone.getTimeZone("EST"));

    System.out.println("\ncalPST Date : " + calPST.getTime());

    System.out.println("\ncalPST Calendar in EST");
    System.out.println(calPST);

  }
}

Here is the output from the above program :

Date : Mon Sep 28 23:00:00 EDT 1998
calEST Date : Mon Sep 28 23:00:00 EDT 1998
calPST Date : Mon Sep 28 23:00:00 EDT 1998

calEST Calendar
java.util.GregorianCalendar[time=907038000558,areFieldsSet=true,areAllFieldsSet=true,
lenient=true,zone=java.util.SimpleTimeZone[id=EST,offset=-18000000,dstSavings=3600000,
useDaylight=true,startYear=0,startMode=3,startMonth=3,startDay=1,startDayOfWeek=1,
startTime=7200000,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=7200000],
firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=1998,MONTH=8,WEEK_OF_YEAR=40,
WEEK_OF_MONTH=5,DAY_OF_MONTH=28,DAY_OF_YEAR=271,DAY_OF_WEEK=2,DAY_OF_WEEK_IN_MONTH=4,
AM_PM=1,HOUR=11,HOUR_OF_DAY=23,MINUTE=0,SECOND=0,MILLISECOND=558,ZONE_OFFSET=-18000000,
DST_OFFSET=3600000]

calPST Calendar
java.util.GregorianCalendar[time=907038000558,areFieldsSet=true,areAllFieldsSet=true,
lenient=true,zone=java.util.SimpleTimeZone[id=PST,offset=-28800000,dstSavings=3600000,
useDaylight=true,startYear=0,startMode=3,startMonth=3,startDay=1,startDayOfWeek=1,
startTime=7200000,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=7200000],
firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=1998,MONTH=8,WEEK_OF_YEAR=40,
WEEK_OF_MONTH=5,DAY_OF_MONTH=28,DAY_OF_YEAR=271,DAY_OF_WEEK=2,DAY_OF_WEEK_IN_MONTH=4,
AM_PM=1,HOUR=8,HOUR_OF_DAY=20,MINUTE=0,SECOND=0,MILLISECOND=558,ZONE_OFFSET=-28800000,
DST_OFFSET=3600000]

Convert PST to EST

calPST Date : Mon Sep 28 23:00:00 EDT 1998

calPST Calendar in EST
java.util.GregorianCalendar[time=907038000558,areFieldsSet=true,areAllFieldsSet=true,
lenient=true,zone=java.util.SimpleTimeZone[id=EST,offset=-18000000,dstSavings=3600000,
useDaylight=true,startYear=0,startMode=3,startMonth=3,startDay=1,startDayOfWeek=1,
startTime=7200000,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=7200000],
firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=1998,MONTH=8,WEEK_OF_YEAR=40,
WEEK_OF_MONTH=5,DAY_OF_MONTH=28,DAY_OF_YEAR=271,DAY_OF_WEEK=2,DAY_OF_WEEK_IN_MONTH=4,
AM_PM=1,HOUR=8,HOUR_OF_DAY=20,MINUTE=0,SECOND=0,MILLISECOND=558,ZONE_OFFSET=-28800000,
DST_OFFSET=3600000]
(Review ID: 37904)
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