How to get all the dates in a month using calender class?

java, java.util.calendar

Solution

If you only want to get the max number of days in a month you can do the following.

// Set day to one, add 1 month and subtract a day
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.DAY_OF_MONTH, 1); 
cal.add(Calendar.MONTH, 1);
cal.add(Calendar.DAY_OF_MONTH, -1);
return cal.get(Calendar.DAY_OF_MONTH);

If you actually want to print every day then you can just set the day of month to 1 and keep adding a day in a loop until the month changes.

Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.DAY_OF_MONTH, 1); 
int myMonth=cal.get(Calendar.MONTH);

while (myMonth==cal.get(Calendar.MONTH)) {
  System.out.print(cal.getTime());
  cal.add(Calendar.DAY_OF_MONTH, 1);
}

Problem

Here I want to display dates like ``` 2013-01-01, 2013-01-02, 2013-01-03, . . ...etc ``` I can get total days in a month ``` private int getDaysInMonth(int month, int year) { Calendar cal = Calendar.getInstance(); // or pick another time zone if necessary cal.set(Calendar.MONTH, month); cal.set(Calendar.DAY_OF_MONTH, 1); // 1st day of month cal.set(Calendar.YEAR, year); cal.set(Calendar.HOUR, 0); cal.set(Calendar.MINUTE, 0); Date startDate = cal.getTime(); int nextMonth = (month == Calendar.DECEMBER) ? Calendar.JANUARY : month + 1; cal.set(Calendar.MONTH, nextMonth); if (month == Calendar.DECEMBER) { cal.set(Calendar.YEAR, year + 1); } Date endDate = cal.getTime(); // get the number of days by measuring the time between the first of this // month, and the first of next month return (int)((endDate.getTime() - startDate.getTime()) / (24 * 60 * 60 * 1000)); } ``` Does anyone have an idea to help me?

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