dateChooser doesn't add next day in Calendar ?

[Ganesh Pat]

My code is

Calendar c= dcday.getSelectedDate();
//hr is a int value assume it is more than 24 i.e 30
 String m,y;
if(hr>24)
        {   

            c.add(c.DAY_OF_MONTH, 1); // here if date is  01/01/2013 then it should go to 02/01/2013 but doesn't add 1 day in it why ? 
// if date is 31/07/2013  then after adding 1 day should go to 01/08/2013 but it doesn't work plea help
           today=c.DAY_OF_MONTH;
           
            m=c.get(c.MONTH);
            y=c.get(c.YEAR);
             hr=hr-24;

        }

[Tony Docherty]

How do you know it's not adding a day, you aren't printing out anything and you a setting 'today' to the constant Calendar.DAY_OF_MONTH and not to the current day.
Try running this:

    Calendar c = Calendar.getInstance();

    System.out.println(c.getTime()+" - "+c.get(Calendar.DAY_OF_MONTH));
    c.add(Calendar.DAY_OF_MONTH, 1);
    System.out.println(c.getTime()+" - "+c.get(Calendar.DAY_OF_MONTH));

[Jinu Vijay]

Calendar cal = Calendar.getInstance();

		System.out.println("Cal: " + cal.get(Calendar.DATE) + "/"
				+ cal.get(Calendar.MONTH) + "/" + cal.get(Calendar.YEAR));

		cal.set(Calendar.DATE, 31);
		System.out.println("Cal: " + cal.get(Calendar.DATE) + "/"
				+ cal.get(Calendar.MONTH) + "/" + cal.get(Calendar.YEAR));

		cal.add(Calendar.DATE, 1);
		
		System.out.println("Cal: " + cal.get(Calendar.DATE) + "/"
				+ cal.get(Calendar.MONTH) + "/" + cal.get(Calendar.YEAR));

For today's date (20/2/2013), the above code returns:
Cal: 20/2/2013
Cal: 31/2/2013
Cal: 1/3/2013

Incrementing the date, auto increments the month too!

[Tony Docherty]

Incrementing the date, auto increments the month too!

Only if you use add(..). If you use roll(..) larger fields are not affected.

BTW I would avoid using the Calendar.DATE constant and use Calendar.DAY_OF_MONTH instead. To Calendar they mean exactly the same thing but the Calendar.DAY_OF_MONTH constant name gives a much clearer meaning of what the constant represents.