Java Utililty Methods Date to Day

List of utility methods to do Date to Day

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Description

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

Method

DategetDayEnd(Date obj)
get Day End 
if (obj == null) {
    throw new NullPointerException();
Calendar ca = new GregorianCalendar();
ca.setTime(obj);
ca.set(Calendar.HOUR_OF_DAY, 23);
ca.set(Calendar.MINUTE, 59);
ca.set(Calendar.SECOND, 59);
...
DategetDayEnd(final Date date, TimeZone timezone)
Get a Date representing the end of the day for the specified date. 
Calendar calendar = Calendar.getInstance();
if (timezone != null) {
    calendar.setTimeZone(timezone);
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, LAST_HOUR_IN_DAY);
calendar.set(Calendar.MINUTE, LAST_MINUTE_IN_HOUR);
calendar.set(Calendar.SECOND, LAST_SECOND_IN_MINUTE);
...
IntegergetDayFromDate(Date date)
get Day From Date 
Integer result = null;
if (date != null) {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(date);
    result = calendar.get(Calendar.DATE);
return result;
String[]getDayMonthYear(Date aDate, boolean isAddSpace)

get day month year

String[] dmys = new String[3];
if (aDate != null) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(aDate);
    int day = cal.get(Calendar.DAY_OF_MONTH);
    if (day < 10) {
        if (isAddSpace) {
            dmys[0] = "0 " + day;
...
intgetDayNumber(Date startDate, Date endDate)
get Day Number 
Calendar startCal = Calendar.getInstance();
startCal.setTime(startDate);
Calendar endCal = Calendar.getInstance();
endCal.setTime(endDate);
if (startCal.after(endCal)) {
    return 0;
int num = 1;
...
intgetDayOfDate(Date date)

Description:Get Monday of the week the day specified by parameter belongs to

Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.DAY_OF_WEEK) - Calendar.SUNDAY;
intgetDayOfThisYear(Date currentdate)
get Day Of This Year 
Calendar cal = Calendar.getInstance();
if (currentdate != null) {
    cal.setTime(currentdate);
} else {
    cal.setTime(new Date());
return cal.get(Calendar.DATE);
intgetDayOfYear(Date date)
get Day Of Year 
Calendar c = Calendar.getInstance(Locale.US);
c.setTime(date);
return c.get(Calendar.DAY_OF_YEAR);
intgetDays(Date t, Date baseDate)
Get days difference between two dates 
Calendar cal = Calendar.getInstance();
cal.setTime(baseDate);
long sl = cal.getTimeInMillis();
long el, delta;
cal.setTime(t);
el = cal.getTimeInMillis();
delta = el - sl;
int value = (int) (delta / (24 * 60 * 60 * 1000));
...
DategetDaysEarlierDate(int days)
Purpose:
getDaysEarlierDate

Calendar cal = Calendar.getInstance();
cal.add(Calendar.DAY_OF_YEAR, -(days));
return cal.getTime();