Calendar Date Range

[anjibman]

Hi All,
I am trying to get the last month date range (1st to end of month). I have following code:

public static void main(String[] args) {
        Calendar todaysDate = Calendar.getInstance();
        Integer month = todaysDate.get(Calendar.MONTH);
        Integer days = todaysDate.get(Calendar.DAY_OF_MONTH);
        Integer year = todaysDate.get(Calendar.YEAR);
        if (month == 0) {
            year--;
            month = 12;
        }
        Calendar lastMonthDate = Calendar.getInstance();
        lastMonthDate.set(year, month, 15); //set 15 to simplyfy 30/31 check. 
        Integer lastDay = lastMonthDate.getMaximum(Calendar.DAY_OF_MONTH);
        
        Calendar startDate = Calendar.getInstance();
        Calendar endDate = Calendar.getInstance();
        
        startDate.set(year, month, 1);
        endDate.set(year, month, lastDay);        

        System.out.println("Date Range : " + startDate.get(Calendar.MONTH)
                + "-"
                + startDate.get(Calendar.DATE)
                + "-"
                + startDate.get(Calendar.YEAR)
                + " to "
                + endDate.get(Calendar.MONTH)
                + "-"
                + endDate.get(Calendar.DATE)
                + "-"
                + endDate.get(Calendar.YEAR));
    }

I am expecting to get print result as
Date Range : 10-1-2012 to 10-31-2012
but I am getting
Date Range : 10-1-2012 to 11-1-2012

What I am doing wrong?

[eRaaaa]

your expectation is already wrong!
the month is 0 based, so october is 9 and not 10 ! (Calendar (Java Platform SE 6))

and so you have to use
startDate.set(year, month-1, 1);
endDate.set(year, month-1, lastDay);

and
(startDate.get(Calendar.MONTH)+1)
(endDate.get(Calendar.MONTH)+1)

[Tolls]

Or just use the constants that come with Calendar.
That's what they're there for.