Java Utililty Methods Week of Year

List of utility methods to do Week of Year

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Description

The list of methods to do Week of Year are organized into topic(s).

Method

intgetWeekOfPreYearWeek(int year, int week)
get Week Of Pre Year Week 
return week == 1 ? getMaxWeekNumOfYear(year) : week - 1;
StringgetWeekOfYear()
get Week Of Year 
String num = Calendar.getInstance().get(Calendar.WEEK_OF_YEAR) + "";
return num.length() == 1 ? "0" + num : num;
intgetWeekOfYear(String year, String month, String day)
get Week Of Year 
Calendar cal = new GregorianCalendar();
cal.clear();
cal.set(new Integer(year).intValue(), new Integer(month).intValue() - 1, new Integer(day).intValue());
return cal.get(Calendar.WEEK_OF_YEAR);
intgetWeekOfYearByDay(String year, String month, String day)
get Week Of Year By Day 
Calendar calendar = Calendar.getInstance(Locale.UK);
calendar.setFirstDayOfWeek(Calendar.MONDAY);
calendar.setMinimalDaysInFirstWeek(4);
calendar.set(Calendar.YEAR, Integer.parseInt(year));
calendar.set(Calendar.MONTH, Integer.parseInt(month) - 1);
calendar.set(Calendar.DAY_OF_MONTH, Integer.parseInt(day));
long milltimes = calendar.getTimeInMillis();
calendar.setTimeInMillis(milltimes);
...
intgetWeekOfYearFromTimestamp(long ms)
get Week Of Year From Timestamp 
if (ms < 0)
    throw new NumberFormatException("argument must be positive");
Calendar cal = Calendar.getInstance(TIMEZONE, LOCALE);
cal.setTimeInMillis(ms);
return cal.get(Calendar.WEEK_OF_YEAR);