Java Utililty Methods Week Day

List of utility methods to do Week Day

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Description

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

Method

StringgetPreviousMonday(Date date, int days)
get Previous Monday 
int weeks = -1;
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.setTime(date);
currentDate.add(GregorianCalendar.DATE, days + 7 * weeks);
Date monday = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preMonday = df.format(monday);
return preMonday;
...
StringgetPreviousOrNextDay(String time, int dayNum)
get Previous Or Next Day 
SimpleDateFormat df = new SimpleDateFormat(DEFAULT_FORMAT_NOHOUR);
Date date = df.parse(time);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.setTime(date);
currentDate.add(GregorianCalendar.DATE, dayNum);
Date monday = currentDate.getTime();
String preMonday = df.format(monday);
return preMonday;
...
DategetPreWeekLastDay()
get Pre Week Last Day 
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
calendar.setFirstDayOfWeek(1);
int week = calendar.get(Calendar.DAY_OF_WEEK);
int day = calendar.get(Calendar.DAY_OF_MONTH);
calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), day + 1 - week);
return calendar.getTime();
StringgetShortWeekday(int dayOfWeek)
Returns the short name of the weekday. 
return getShortWeekday(dayOfWeek, Locale.getDefault());
StringgetShortWeekday(String day)
Get short day string for current locale 
DateFormatSymbols symbols;
String[] defaultDays;
String[] Days;
symbols = new DateFormatSymbols(new Locale("en", "US")); 
defaultDays = symbols.getShortWeekdays();
symbols = new DateFormatSymbols(); 
Days = symbols.getShortWeekdays();
int i = 0;
...
StringgetSQLForWeekSunday(String weekString)
getSQLForWeekSunday: sql for sunday 
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-ww", new Locale("de", "DE"));
java.util.Date startDate = getNextSunday(sdf.parse(weekString));
SimpleDateFormat sdfOutput = new SimpleDateFormat("dd.MM.yyyy");
return "to_date('" + sdfOutput.format(startDate) + "','DD.MM.YYYY')";
StringgetSundayOfWeek()
get Sunday Of Week 
Calendar c = Calendar.getInstance();
java.text.SimpleDateFormat df = new java.text.SimpleDateFormat("yyyy-MM-dd");
c.setFirstDayOfWeek(Calendar.MONDAY);
c.set(Calendar.DAY_OF_WEEK, 1);
return df.format(c.getTime());
DategetThisWeekMonday()
get This Week Monday 
Calendar cal = Calendar.getInstance();
cal.setTime(getTodayZero());
cal.set(Calendar.DAY_OF_WEEK, 2);
return cal.getTime();
intgetTodayOfWeek()
get Today Of Week 
calendar = Calendar.getInstance();
int dayOfWeekChina = calendar.get(calendar.DAY_OF_WEEK) - 1;
return dayOfWeekChina;
StringgetWeek(Date today, int index, String format)
get Week 
Calendar calendar = Calendar.getInstance();
calendar.setTime(today);
ArrayList<Date> list = getWeekDateList(today, 0);
Date d = calendar.getTime();
for (Date date : list) {
    Calendar c = Calendar.getInstance();
    c.setTime(date);
    if (c.get(Calendar.DAY_OF_WEEK) == index + 1) {
...