Java Utililty Methods Date Add

List of utility methods to do Date Add

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Description

The list of methods to do Date Add are organized into topic(s).

Method

DatedateAdd(final Date baseDateTime, int daysToAdd, boolean chopTime)
Method dateAdd. 
if (baseDateTime == null)
    throw new RuntimeException("Null date passed to Utils.dateAdd.");
Date dateTime = baseDateTime;
if (chopTime)
    dateTime = getMidnight(dateTime);
Calendar calendar = Calendar.getInstance();
calendar.setTime(dateTime);
calendar.add(Calendar.DATE, daysToAdd);
...
DatedateAdd(int datePart, int amount, Date date)
Method that returns the result of date + amount for the specified datePart using Calendar.get(int) for obtaining it 
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(datePart, cal.get(datePart) + amount);
return cal.getTime();
DatedateAdd(int interval, Date date, int n)
date Add 
long time = date.getTime() / 1000L;
switch (interval) {
case 1:
    time += n * 86400;
    break;
case 2:
    time += n * 604800;
    break;
...
StringDateAdd(String strDate, int iCount, int iType)
Date Add 
Calendar Cal = parseDateTime(strDate);
int pType = 0;
if (iType == 0) {
    pType = 1;
} else if (iType == 1) {
    pType = 2;
} else if (iType == 2) {
    pType = 5;
...
StringDateAdd3Days(String _date)
Date Add Days 
Calendar cl = Calendar.getInstance();
Date date = null;
try {
    date = (Date) simpleDateFormat.parse(_date);
} catch (ParseException e) {
    e.printStackTrace();
cl.setTime(date);
...
DatedateAddDay(Date date, int day)
date Add Day 
if (date == null)
    return now();
Calendar c = Calendar.getInstance();
c.setTime(date);
c.add(Calendar.DATE, day);
return c.getTime();
StringDateAddDays(Date _date, int days)
Date Add Days 
Calendar cl = Calendar.getInstance();
cl.setTime(_date);
cl.add(Calendar.DAY_OF_YEAR, days);
_date = cl.getTime();
return simpleDateFormat.format(_date);
DatedateAddDays(Date date, int days)
date Add Days 
long now = date.getTime() + (long) days * DAY_IN_MILLISECOND;
return new Date(now);
DatedateAddDays(Date date, int days)
Add days to an existing date 
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.DATE, days);
return cal.getTime();
StringdateAddDays(Date time, int days, String dateFormat)
date Add Days 
SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
long timeLong = time.getTime() / 1000 + 60l * 60 * 24 * days;
time.setTime(timeLong * 1000);
String timeStr = sdf.format(time);
return timeStr;