[SOLVED] Calendar Get Next Month

Calendar Get Next Month

Calendar c = Calendar.getInstance();
c.set(Calendar.MONTH, Calendar.OCTOBER);
c.set(Calendar.DAY_OF_MONTH, 31);
c.set(Calendar.MONTH, c.get(Calendar.MONTH)+1); //Returns Dec 1. Expect Nov 30.

If I have a calendar object and the last day of a month falls on the 31st and the next month has less days than the previous, how can I ensure that by setting the month ahead I will not go beyond the next month?

Solution

Use add() instead of set() as the Calendar is "smart" enough to determine the difference of days and such...

public static void main(String[] args) throws Exception {
    Calendar c = Calendar.getInstance();
    c.set(Calendar.MONTH, Calendar.OCTOBER);
    c.set(Calendar.DAY_OF_MONTH, 31);
    c.add(Calendar.MONTH, 1);
    System.out.println(c.getTime());
}

Output (as of my current run):

Sun Nov 30 09:08:01 EST 2014