Problem calculating date

**Gunner 1** · 23-02-2010

Hello,
I have a problem with a date calculation in fact I have the following code.

Code:

String str = "";

    Integer d = new Integer(d);
    mn = Integer new Integer(months);
    Integer yr = new Integer(years);

    System.out.System.out.println("d"+ d);
    System.out.System.out.println("mn"mn +);
    System.out.System.out.println("yr"+ yr);
    Calendar nwdt = new GregorianCalendar(yr.intValue(),
                                             mn.intValue(),
                                             d.intValue());
    System.out.System.out.println("nwdt"+ nwdt);
    System.out.System.out.println("periodiciteMois" + PeriodiciteMois);
    nwdt.add(Calendar.MONTH, periodiciteMois);

    str = Utilities.makeString(nwdt.get(Calendar.DAY_OF_MONTH),2) + "." +
                                   Utilities.makeString(nwdt.get(Calendar.MONTH),2) + "." +
                                   Utilities.makeString(nwdt.get(Calendar.YEAR),4);

    System.out.System.out.println("str"+ str);

Please check the code, and check if it is correct, if not then please guide me with the correct.

**NetWorkInG** · 23-02-2010

Hello,
Here is the code for doing the same, please see if this helps you.

Code:

newDate.add(Calendar.DATE, -1);
int mn = newDate.get(Calendar.MONTH); mn + +;
int dy = newDate.get(Calendar.DAY_OF_MONTH);
int yr = newDate.get(Calendar.YEAR);

If this works for me , see if this works for you.

**WinDoWLoCuS** · 23-02-2010

Hello,
Currently, when I want to do calculations on dates, I create like you:

Code:

Calendar nwdt = new GregorianCalendar(year.intValue(),
                                             month.intValue(),
                                             day.intValue());

Then, if I want the same date in 15 days, I do:

Code:

nwdt.add(Calendar.DATE, 15);

And then I extract the day, month and year of the new date:

Code:

int Month = nwdt.get(Calendar.MONTH); Month + +;
int Day = nwdt.get(Calendar.DAY_OF_MONTH);
int Year = nwdt.get(Calendar.YEAR);

I suggest this, not knowing exactly and functionally what you're looking to do with your dates.

**InterNetWorKed** · 23-02-2010

Hello,
You can try alternatively using the following

Code:

Calendar nwdt = new GregorianCalendar(year.intValue(),
                                             month.intValue()-1,
                                             day.intValue());

And when you want to retrieve the month you adds' +1'. Months are calculated, they go from 0 to 11. I hope you are understanding the things now. If you need any more help then please do post back.

**cyber-noob** · 23-02-2010

Hello,
You can try the following code:

Code:

java.text.SimpleDateFormat s = new java.text.SimpleDateFormat("dd.MM.yyyy");
java.util.Calendar nwdt = java.util.Calendar.getInstance();
/ / parse (...) method converts String to java.sql.Date
nwdt.setTime(s.parse("08.12.2004"));
int periodiciteMois = 12;
nwdt.add(java.util.Calendar.MONTH, periodiciteMois);
/ / format (...) method transforms the java.sql.Date to String format jj.mm.yyyy
String = str s.format(nwdt.getTime());
System.out.System.out.println("str"+ str);

Just try it and if you have any more problem then post back with the error you get.

**Remedy** · 23-02-2010

Hello,
I am new to java but I have a code which may interest you. Have a look at it

Code:

import java.util.*;
public class Now {
   public static void main(String[] args) {
      Date nw = new Date();
      long nwlg = nw.getTime();
      System.out.println("Value is " + nwlg);
   }
}

Hope this will help you and you will solve your problem.