Java Utililty Methods Month Calculate

List of utility methods to do Month Calculate

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Description

The list of methods to do Month Calculate are organized into topic(s).

Method

intintToCalendarMonth(int month)
int To Calendar Month 
if (month == 1) {
    return Calendar.JANUARY;
} else if (month == 2) {
    return Calendar.FEBRUARY;
} else if (month == 3) {
    return Calendar.MARCH;
} else if (month == 4) {
    return Calendar.APRIL;
...
booleanisFirstOfMonth(long date)
is First Of Month 
boolean ret = false;
Calendar calendar = CALENDAR;
synchronized (calendar) {
    calendar.setTimeInMillis(date);
    int currentMonth = calendar.get(Calendar.MONTH);
    calendar.add(Calendar.DATE, -1);
    int yesterdayMonth = calendar.get(Calendar.MONTH);
    ret = (currentMonth != yesterdayMonth);
...
booleanisMonthEnd(Date date)
is Month End 
Calendar cal = Calendar.getInstance();
cal.setTime(date);
if (cal.get(Calendar.DATE) == cal.getActualMaximum(Calendar.DAY_OF_MONTH))
    return true;
else
    return false;
booleanisSameMonth(final Calendar c1, final Calendar c2)
is Same Month 
return c1.get(Calendar.MONTH) == c2.get(Calendar.MONTH);
intmonthsBetween(String pFormerStr, String pLatterStr)
months Between 
GregorianCalendar vFormer = parse2Cal(pFormerStr);
GregorianCalendar vLatter = parse2Cal(pLatterStr);
return monthsBetween(vFormer, vLatter);
DatenextMonth(Date date, int months)
next Month 
Calendar cal = Calendar.getInstance();
if (date != null) {
    cal.setTime(date);
cal.add(Calendar.MONTH, months);
return cal.getTime();
DatenextMonths(int diff)
next Months 
return add(new Date(), Calendar.MONTH, diff);
CalendarstartOfMonth(Date d)
start Of Month 
Calendar c = new GregorianCalendar();
c.setTime(d);
int yy = c.get(Calendar.YEAR);
int mm = c.get(Calendar.MONTH);
c = new GregorianCalendar(yy, mm, 1);
return c;
DatestartOfMonth(Date date)
start Of Month 
if (date == null) {
    return null;
Calendar cal = new GregorianCalendar();
cal.setTime(date);
cal.set(Calendar.DAY_OF_MONTH, 1);
return cal.getTime();
DatestartOfMonthDate(Date date)
start Of Month Date 
Calendar now = Calendar.getInstance();
now.setTime(date);
now.set(Calendar.DAY_OF_MONTH, 1);
now.set(Calendar.HOUR_OF_DAY, 0);
now.set(Calendar.MINUTE, 0);
now.set(Calendar.SECOND, 0);
now.set(Calendar.MILLISECOND, 0);
return now.getTime();
...