Java Utililty Methods Date to Day

if (d == null)
    return 0;
final Calendar c = new GregorianCalendar();
c.setTime(d);
return c.get(Calendar.DAY_OF_MONTH);

Calendar cal = Calendar.getInstance();
cal.setTime(date);
return cal.get(Calendar.DAY_OF_MONTH);

if (date == null) {
    return null;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
...

if (date == null) {
    return 0;
Calendar cal = Calendar.getInstance();
cal.setTime(date);
return cal.get(Calendar.DATE);

return getCalendar(date).get(5);

if (date == null) {
    return null;
Calendar ca = Calendar.getInstance();
ca.setTime(date);
return Integer.valueOf(ca.get(DAY_OF_MONTH));

return parseDateToCalendar(date).get(Calendar.DATE);

Calendar cld = Calendar.getInstance();
cld.setTime(date);
return cld.get(Calendar.DAY_OF_MONTH);

return newCalendar(date).get(Calendar.DAY_OF_MONTH);

return getField(date, Calendar.DAY_OF_MONTH);