??? public static void main(String[] args) throws ParseException {?? ??? ?/*?? ??? ? *?? ??? ? */?? ??? ?String dateFormat = "yyyy-mm-dd";?? ??? ?SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd");?? ??? ?Date date = sdf.parse("2015-12-01");?? ??? ?Calendar calendar = Calendar.getInstance();?? ??? ?calendar.setTime(date);?? ??? ?calendar.add(Calendar.YEAR, 3);?? ??? ?System.out.println(calendar.getTime());?? ??? ?calendar.add(Calendar.MONTH, 3);?? ??? ?System.out.println(calendar.getTime());?? ??? ?calendar.add(Calendar.DAY_OF_YEAR, 10);?? ??? ?calendar.set(Calendar.DAY_OF_WEEK, 3);?? ??? ??? ??? ?System.out.println(calendar.getTime());?? ?}