Gregorian calendar question

Hello,
I'm having some trouble understanding the date format method, in particular, how to institute the LONG, SHORT variables of a date output.
Could somebody possibly explain where to use it? I've check the api and I just couldn't grasp it fully from that.
thank you

No you don't sound demanding. It's always good to ask.
Because SimpleDateFormat formats a Date instance. So you need a Date instance for it.
You have a Calendar instance. Which is good because it's the right thing to be using when you want to add days like that. But a Calendar is not a Date so you can't use the Calendar in the formatter. You have to get the Date instance that represents the date in the Calendar instance.
And convienently there is a method called getTime that returns a Date instance from Calendar.
To be honest when I was going to help you out at first I wrote it (and you can) as
System.out.println("You will be 1,000 days old on: " + outCome.format(helpMe.getTime()));But then I thought better of it since that's more confusing. It's the same code as what I gave you but crammed onto one line.
And thanks for using the code tags. Appreciated. :)

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Get time difference Within 2 gregorian Calendars, 1 obtained via SimpleDate

Hi guys
I'm having a problem with an application, i've posted something before about it and with two GregorianCalendars.
This one is receiving a GregorianCalendar value from the default constructor, and the second gregorian calendar from a String, using SimpleDateFormat class
The problem is that whenever i start the application it get stucked at: "Deze datum ligt: 56 in het verleden" meaning from dutch "this datum is 56 days in the past"
the issue is thus at the method "getVerschil()" which means "get difference" in Dutch.
Even if you try to modify the date fields from the class with the main method, inserting new dates it keeps on telling me 56.
I was wondering if you see anything strange in the code and then a little question.
Does the JDK sees a GregorianCalendar made with the default constructor, and a GregorianCalendar made with a SimpleDateFormat string patter "dd-mm-yyyy", in the same way?
I mean, can java make a comparison within the 2 Calendars recognising which are days and which are the months?
Thank you guys:
Below the codes, the first one is the interface and below you'll see the main method class which inserts the date with SimpleDateFormat
public class Kalender {
      * attributes
     private final String patroon;
     private String datum= null;
     private String userDagText= null;
     private int userDag;
     private int userMaand;
     private int userJaar;
     long DAGMILLIS= 24*60*60*1000;
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     GregorianCalendar nu= new GregorianCalendar();
     //deze kalender word gemaakt door de user-ingevoerde datum
     GregorianCalendar userCalendar= new GregorianCalendar(userDag, userMaand, userJaar);
     //datum formatter
     SimpleDateFormat sdf;
      * Constructor
     public Kalender(String datum, String patroon){
          this.patroon= patroon;
          this.datum=datum;
          sdf= new SimpleDateFormat(patroon);
     }//EOF
     public void setUserDate(){
          Date userDatum= sdf.parse(datum, new ParsePosition(0));
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          userDag= userCalendar.get(Calendar.DAY_OF_WEEK);
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     }//EOF
      * deze methode returns de hele date
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          return sdf.format(userCalendar.getTime());
     }//EOF
      * deze methode bepaald of de ingevoerde datum een schrikkeljaar is
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          long nuMillis= nu.getTimeInMillis();
          if(nuMillis==userMillis){
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          } else if(nuMillis>userMillis){//userdatum in het verleden
               long millisVerschil= nuMillis-userMillis;
               long dagenVerschil= millisVerschil / (DAGMILLIS);
               return "Deze datum ligt: "+dagenVerschil+" in het verleden";
          } else if(nuMillis<userMillis){//userdatum in het toekomst
               long millisVerschil= userMillis- nuMillis;
               long dagenVerschil= millisVerschil / (DAGMILLIS);
               return "Deze datum ligt: "+dagenVerschil+" in het toekomst";
          return " ";
}The tester (main) class which creates the second GregorianCalendar is the following
public class KalenderTest {
     public static void main(String[] args){
          //constructor werkt
          Kalender kal= new Kalender("01-28-2010", "dd-mm-yyyy");
          //setUserDate werkt
          kal.setUserDate();
          //testen van getVerschil
          System.out.println(""+kal.getVerschil());
     }Edited by: classboy on Apr 26, 2010 9:22 PM
Edited by: classboy on Apr 26, 2010 9:23 PM

classboy wrote:
Does the JDK sees a GregorianCalendar made with the default constructor, and a GregorianCalendar made with a SimpleDateFormat string patter "dd-mm-yyyy", in the same way?Of course not.
And is there anything wrong with your code? Plenty. You passed the fields to the GregorianCalendar constructor in the wrong order. You got the day of the week and then used it as if it were the day of the month. That's just from a quick look, there's probably more.

F150 dunning prog. and Gregorian calendar-wrong interest rates calculation

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This may have a simple solution, but its currently got me stumped. Basically, after some calculation I determine the date that a particular event should occur on. These events are listed in a JTable where the column headers are the dates of the beginning of the weeks. In order to place my calculated event in the correct column I create a Gregorian Calendar, set it to the date of the event and then set the day of the week to the beginning of the week. Normally this works fine but for a few instances, rather than getting the date at the beginning of the week, I get the date thats the beginning of the next week.
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As for code I'll post the conversion bit which is:
for (int i = 0; i < areaNameSelectionTable.getRowCount(); i++) {
GregorianCalendar conversionCalendar = new GregorianCalendar();
conversionCalendar.setTime((java.util.Date) prioritiesTable.getValueAt(i, 10));
conversionCalendar.set(GregorianCalendar.DAY_OF_WEEK, GregorianCalendar.SUNDAY);
}//end for loopI then create a string from the GregorianCalendar in the format DD/MM/YYYY and compare that with the headers of my table columns (Also dates in the format DD/MM/YYYY) When they match thats the column this particular event should appear in. I can post this code if necessary, but I dont know if its relevant.
Thanks

Chinese character Display for Date from Gregorian calendar in JSP

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Hey
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import java.util.GregorianCalendar;
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Gregorian Calendar & Regional Settings effect

I have a problem where the last week of the month gets cut off in my Calendar display.
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Hi Rajesh,
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- if it has 4 days of the new year it is CW1.
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Rgds,
Colum

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Gregorian calendar question

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