Java Utililty Methods Date Convert

List of utility methods to do Date Convert

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Description

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

Method

CalendarconvertToDateTime(String source)
Code from Axis1 code base Note - We only follow the convention in the latest schema spec 
if ((source == null) || source.trim().equals("")) {
    return null;
source = source.trim();
Date date = null;
Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.setLenient(false);
...
DateconvertToStartOfDay(Date date)
convert To Start Of Day 
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
return cal.getTime();
longconvertTweetDateToLong(String date)

Convert a given date according to a format used by Twitter to long. 

if (date == null || (date = date.trim()).length() == 0) {
    throw new IllegalArgumentException("Date must not be null/empty.");
char fc = date.charAt(0);
if (Character.isDigit(fc)) { 
    date = formatTweetDate1(date);
} else { 
    date = formatTweetDate2(date);
...
DateconvertZeroHourDate(Date source)
convert Zero Hour Date 
Calendar cal = Calendar.getInstance();
cal.setTime(source);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
return cal.getTime();
CalendardateToCal(Date date)
date To Cal 
if (date == null) {
    return null;
Calendar cal = Calendar.getInstance();
cal.setTime(date);
return cal;
StringdateToEnglishString(java.util.Date date)
date To English String 
return dateToEnglishString(date, true, '-', '-');
doubledateToFMDate(Date date)
date To FM Date 
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int y = calendar.get(Calendar.YEAR);
int m = calendar.get(Calendar.MONTH);
int d = calendar.get(Calendar.DAY_OF_MONTH);
int datePart = ((y - 1700) * 10000) + ((m + 1) * 100) + d;
return datePart;
intdateToInt(Date date)
date To Int 
Calendar cal = Calendar.getInstance();
cal.setTimeZone(TimeZone.getTimeZone("GMT"));
cal.setTime(date);
return cal.get(Calendar.YEAR) * 10000 + (cal.get(Calendar.MONTH) + 1) * 100 + cal.get(Calendar.DATE);
StringdateToISOXDSb(Date date)
date To ISOXD Sb 
if (date == null) {
    return null;
Calendar c = Calendar.getInstance();
c.setTime(date);
int ano = c.get(Calendar.YEAR);
int mes = c.get(Calendar.MONTH) + 1;
int dia = c.get(Calendar.DAY_OF_MONTH);
...
doubledateToJulian(Date date)
date To Julian 
Calendar cal = Calendar.getInstance();
cal.set(1858, 10, 17, 0, 0, 0);
double day1 = cal.getTimeInMillis() / 86400000.0;
cal.setTime(date);
double day2 = cal.getTimeInMillis() / 86400000.0;
return (day2 - day1);