java Calendar get（calendar.MONTH）返回0

Question

Why does calendar.get(calendar.MONTH) return 0(zero) here: ?

Date date = new SimpleDateFormat("yyyy-mm-dd").parse("2013-02-12");

Calendar calendar = Calendar.getInstance();

calendar.setTime(date);

System.out.println( calendar.get(calendar.MONTH) ); // 0 ??

Answer 1

MM for month and mm minute. Use format - yyyy-MM-dd , you will get desired output which is 1 .

Date date = new SimpleDateFormat("yyyy-MM-dd").parse("2013-02-12");

Answer 2

Got it.. Sorry..

The answer: because I use "mm" but not "MM"

Answer 3

new SimpleDateFormat("yyyy-mm-dd")应该是new SimpleDateFormat("yyyy-MM-dd")