Unable to set GregorianCalendar Month and Date

Question

Im trying to set the month and date of a Gregorian Calendar:

GregorianCalendar startCalendar = new GregorianCalendar();

startCalendar.set(GregorianCalendar.MONTH, 3);
System.out.println(startCalendar.MONTH);
startCalendar.set(GregorianCalendar.DATE, 9);
System.out.println(startCalendar.DATE);

The output is:

2
5

It doesn't seem to matter which numbers i use (ie. if i replace the 3 and 9), it always has the same output

Answer 1

References:

• GregorianCalendar (Java Platform SE 8 )
• Calendar (Java Platform SE 8 )

MONTH and DATE are field numbers and aren't the actual value of the fields. You should use get() method to get the number set.

GregorianCalendar startCalendar = new GregorianCalendar();

startCalendar.set(GregorianCalendar.MONTH, 3);
System.out.println(startCalendar.get(GregorianCalendar.MONTH));
startCalendar.set(GregorianCalendar.DATE, 9);
System.out.println(startCalendar.get(GregorianCalendar.DATE));