日历设置第二天的警报

我正在使用日历。我使用下面的代码来设置警报。但！！！如果我尝试在星期一（Calendar.Monday）设置闹钟，则实际闹钟将在星期二设置。为什么会这样？我也尝试使用，Calendar.getInstance(Locale.getDefault())但是没有用。

这是我为星期日设置警报的方式：

setAlarm(Calendar.SUNDAY, h, m, k, y);

我的setAlarm（）方法：

public void setAlarm(int dayOfWeek, int hour, int minute, int position, int y) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_WEEK, dayOfWeek);

        calendar.set(Calendar.HOUR, hour);
        calendar.set(Calendar.MINUTE, minute);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(context,MyReceiver_Alarm.class);
        Long alarmTime = calendar.getTimeInMillis();

        PendingIntent pendingIntent = PendingIntent.getBroadcast(context.getApplicationContext(), position , intent, PendingIntent.FLAG_UPDATE_CURRENT);
        alarmManager.setExact(AlarmManager.RTC_WAKEUP, alarmTime, pendingIntent);
        Log.e("Point_1", "Time is " + calendar.getTime());
    }

谢谢你。