Java Utililty Methods SQL Time Calculate

Calendar c = Calendar.getInstance();
c.setTime(getDateTime(dateTime));
int month = c.get(2) + 1;
return month;

Calendar c = Calendar.getInstance();
c.setTime(getDateTime(dateTime));
int month = c.get(c.MONTH) + 1;
return month;

List list = new ArrayList();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
Date d;
d = sdf.parse(mintime);
List<String> filelist = getAllFileName(path);
for (String file : filelist) {
    File f = new File(file);
    Timestamp time = new Timestamp(f.lastModified());
...

Calendar calendar = Calendar.getInstance();
long longDate = (calendar.getTime()).getTime() + (1000 * 60 * 60 * 24 * 1);
java.util.Date date = new java.util.Date(longDate);
calendar.setTime(date);
return toDateTimeString(calendar.getTime(), format);

String[] timeArray = { formatTime(startTime, TIME_24_HOUR_FORMAT),
        formatTime(shiftLength, TIME_24_HOUR_FORMAT) };
Time endTime = sumTimes(timeArray, new SimpleDateFormat(TIME_24_HOUR_FORMAT));
return endTime;

Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DAY_OF_MONTH, -1);
return toDateTimeString(calendar, format);