Calendar object question

Question

Hi,
I have a Calendar object.
Calendar currentDate = Calendar.getInstance();I'm setting the object to:
java.util.GregorianCalendar[time=1049956535186,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",offset=3600000,dstSavings=3600000,useDaylight=true,transitions=143,lastRule=java.util.SimpleTimeZone[id=Europe/Berlin,offset=3600000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,endTimeMode=2]],firstDayOfWeek=2,minimalDaysInFirstWeek=4,ERA=1,YEAR=2003,MONTH=3,WEEK_OF_YEAR=15,WEEK_OF_MONTH=2,DAY_OF_MONTH=10,DAY_OF_YEAR=100,DAY_OF_WEEK=5,DAY_OF_WEEK_IN_MONTH=2,AM_PM=0,HOUR=8,HOUR_OF_DAY=8,MINUTE=35,SECOND=35,MILLISECOND=186,ZONE_OFFSET=3600000,DST_OFFSET=3600000]
I make a clone of this object:
Calendar currentDate2 = (Calendar)currentDate.clone();Then I set the clone to:
currentDate2.set(Calendar.HOUR,12);
currentDate2.set(Calendar.SECOND,0);
currentDate2.set(Calendar.MINUTE,0);
currentDate2.set(Calendar.MILLISECOND,0);I print currentDate2:
System.out.println("currentDate2="+currentDate2);
System.out.println("currentDate2 hour="+ currentDate2.get(Calendar.HOUR));
System.out.println("currentDate2 minute="+currentDate2.get(Calendar.MINUTE));
System.out.println("currentDate2 second="+currentDate2.get(Calendar.SECOND));
System.out.println("currentDate2 millisecond="+currentDate2.get(Calendar.MILLISECOND));I get these results:
currentDate2=
java.util.GregorianCalendar[time=?,areFieldsSet=false,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",offset=3600000,dstSavings=3600000,useDaylight=true,transitions=143,lastRule=java.util.SimpleTimeZone[id=Europe/Berlin,offset=3600000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,endTimeMode=2]],firstDayOfWeek=2,minimalDaysInFirstWeek=4,ERA=1,YEAR=2003,MONTH=3,WEEK_OF_YEAR=15,WEEK_OF_MONTH=2,DAY_OF_MONTH=10,DAY_OF_YEAR=100,DAY_OF_WEEK=5,DAY_OF_WEEK_IN_MONTH=2,AM_PM=0,HOUR=12,HOUR_OF_DAY=8,MINUTE=0,SECOND=0,MILLISECOND=0,ZONE_OFFSET=3600000,DST_OFFSET=3600000]
currentDate2 hour=0
currentDate2 minute=0
currentDate2 second=0
currentDate2 millisecond=0
What am I doing wrong? When I print the whole "currentDate2" I get the right values of hour, minute, second and millisecond. But when I print one at a time I only get zeros. Why?
An other question:
What is the difference if I write:
currentDate2.get(Calendar.SECOND);orcurrentDate2.SECOND;(it doesn't work if I write like this either).
Thanks in advance

Answer 1

by the way: do use GregorianCalendar instead of Calendar:
GregorianCalendar gc = new GregorianCalendar(); Calendar.getInstance() will return you a locale specific calandar, which will be a GregorianCalendar unless you are in Thiland, in which case you will get a sun.util.BuddhistCalendar.... check out the source code...
now back to the actual question.... i believe that your problem is defenately to do with the confusion between the HOUR and the HOUR_OF_DAY like someone else pointed out as well.... HOUR represents a 12 hour clock hour while the HOUR_OF_DAY represents a 24 hour clock hour.... so in the first you would have to cater for the AM_PM field as well....
when displaying the calendar do System.out.println(currentDate.getTime());
to display it in a more understandable format....
hope this helps
omer