Name: rm29839 Date: 12/01/97


import java.util.*;

/* The following source code brings out the
 * following behavior in java.util.Calendar
 * in both jdk 1.1.3 and 1.1.4.
 *
 * When using the set() routines,
 * Calendar.setTimeZone() fails to re-initialize
 * some state that was created in the
 * first call to setTimeZone() (or the
 * constructor) which specifies the timezone
 * that the wallclock time in the set() calls
 * refer to.
 *
 * Additionally, when using get() calls,
 * setTimeZone() doesn't change the wallclock
 * time retrieved by get().
 */
class CalBug {
public static void main (String args[]) {
TimeZone GMT = TimeZone.getTimeZone("GMT");
TimeZone PST = TimeZone.getTimeZone("PST");
int sec = 0, min = 0, hr = 0, day = 1, month = 10, year = 1997;

Calendar cal1 = new GregorianCalendar(PST);
cal1.setTime(new Date(880698639000L));
System.out.println("PST 1 is: " + cal1.get(cal1.HOUR_OF_DAY));
cal1.setTimeZone(GMT);
// Issue 1: Changing the timezone doesn't change the
// represented time.
System.out.println("GMT 1 is: " + cal1.get(cal1.HOUR_OF_DAY));
cal1.setTime(new Date(880698639000L));
System.out.println("GMT 2 is: " + cal1.get(cal1.HOUR_OF_DAY));


Calendar cal2 = new GregorianCalendar(GMT);
Calendar cal3 = new GregorianCalendar(PST);

cal2.set(cal1.get(cal1.YEAR),
cal1.get(cal1.MONTH),
cal1.get(cal1.DAY_OF_MONTH),
cal1.get(cal1.HOUR_OF_DAY),
cal1.get(cal1.MINUTE),
cal1.get(cal1.SECOND));

System.out.println("RGMT 1 is: " + cal2.getTime().getTime());
cal3.set(year, month, day, hr, min, sec);
System.out.println("RPST 1 is: " + cal3.getTime().getTime());
cal3.setTimeZone(GMT);
System.out.println("RGMT 2 is: " + cal3.getTime().getTime());
cal2.set(cal1.get(cal1.YEAR),
cal1.get(cal1.MONTH),
cal1.get(cal1.DAY_OF_MONTH),
cal1.get(cal1.HOUR_OF_DAY),
cal1.get(cal1.MINUTE),
cal1.get(cal1.SECOND));
// Issue 2: Calendar continues to use the timezone in its
// constructor for set() conversions, reguardless
// of calls to setTimeZone()
System.out.println("RGMT 3 is: " + cal3.getTime().getTime());
}
}
(Review ID: 21053)
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