Java Date-related formatting (ii)

Import Java.util.Calendar;

Import Java.util.Date;
Import Java.util.GregorianCalendar;

public class Zcalendarutils {

/**
* Take last year's Today
* @return
*/
public static String Getlastyear () {
Calendar cal = Calendar.getinstance ();
Cal.add (Calendar.year,-1);
Date d = cal.gettime ();
Return Datetimeutils.formattodatetime (d);
}

/**
* Get a day of the week
* @param DT
* @return
*/
public static String getweekofdate (Date dt) {
String[] weekdays = {"7", "1", "2", "3", "4", "5", "6"};
Calendar cal = Calendar.getinstance ();
Cal.settime (DT);
int w = cal.get (Calendar.day_of_week)-1;
if (W < 0) {
w = 0;
}
return WEEKDAYS[W];
}
/**
* Take the current day of the week
* @return
*/
public static String Getcurrentweek () {
String day = getweekofdate (New Date ());
Return day;
}

/**
* Take the first day of the current month
* @return
*/
public static String Getfirstdayofcurrentmonth () {
Calendar cal = Calendar.getinstance ();
Cal.set (Calendar.day_of_month, 1);
Date d = cal.gettime ();
Return Datetimeutils.formattodate (d);
}

/**
* Take yesterday
* @return
*/
public static String Getyesterday () {
Calendar cal = Calendar.getinstance ();
Cal.add (Calendar.day_of_month,-1);
Date d = cal.gettime ();
Return Datetimeutils.formattodate (d);
}

/**
* Take the last day of the current month
* @return
*/
public static String Getlastdayofcurrentmonth () {
Calendar cal = Calendar.getinstance ();
Cal.add (Calendar.month, 1);
Cal.set (Calendar.day_of_month, 1);
Cal.add (Calendar.day_of_month,-1);
Date d = cal.gettime ();
Return Datetimeutils.formattodate (d);
}
/**
* Take the first day of last month
* @return
*/
public static String Getfirstdayoflastmonth () {
Calendar cal = Calendar.getinstance ();
Cal.add (Cal. MONTH,-1);
Cal.set (Calendar.day_of_month, 1);
Date d = cal.gettime ();
Return Datetimeutils.formattodate (d);
}
/**
* Take last day of last month
* @return
*/
public static String Getlastdayoflastmonth () {
Calendar cal = Calendar.getinstance ();
Get the first day of the month on the system current time object
Cal.set (Calendar.day_of_month, 1);
Date minus one to get the last day of the month time object
Cal.add (Calendar.day_of_month,-1);
Date d = cal.gettime ();
Return Datetimeutils.formattodate (d);
}

/**
* Take the first few weeks of the current month
* @return
*/
public static int Getweeknumber () {
Calendar calendar = Calendar.getinstance ();
Calendar.setfirstdayofweek (Calendar.monday);
Calendar.settime (New Date ());
Return Calendar.get (Calendar.week_of_month)-1;
}
/**
* The week ordinal of the month in which the given date is taken
* @param newdate
* @param Week
* @return
*/
public static Calendar Getcalendar (Date newdate, int week) {
Calendar calenew = Calendar.getinstance ();
Calenew.settime (newdate);
Calenew.add (Calendar.week_of_month, week-1);
return calenew;
}
/**
* won the first day of last week
*
* @return
*/
public static String Getfirstdayoflastweek () {
int currentweekno = Zcalendarutils.getweeknumber ();
Date date = Zcalendarutils.getfirstdayofweek (new date (), currentWeekNo-1);
return datetimeutils.formattodate (date);
}
/**
* Get the first day of the current week
*
* @return
*/
public static String Getfirstdayofcurrentweek () {
int currentweekno = Zcalendarutils.getweeknumber ();
Date date = Zcalendarutils.getfirstdayofweek (new date (), currentweekno);
return datetimeutils.formattodate (date);
}
/**
* Get the last day of the week
*
* @return
*/
public static String Getlastdayoflastweek () {
int currentweekno = Zcalendarutils.getweeknumber ();
Date date = Zcalendarutils.getlastdayofweek (new date (), currentWeekNo-1);
return datetimeutils.formattodate (date);
}
/**
* Get the last day of the current week
*
* @return
*/
public static String Getlastdayofcurrentweek () {
int currentweekno = Zcalendarutils.getweeknumber ();
Date date = Zcalendarutils.getlastdayofweek (new date (), currentweekno);
return datetimeutils.formattodate (date);
}

/**
* Gets the first day of the nth week of the month on which a given date is located
*
* @return
*/
private static date Getfirstdayofweek (date month, int week) {
Calendar Mycale = Calendar.getinstance ();
try{
GregorianCalendar GC = (GregorianCalendar) getcalendar (month, week);
Mycale.settime (Gc.gettime ());
Mycale.set (Calendar.date, Gc.get (calendar.date)-Gc.get (Calendar.day_of_week) + 2);
}catch (Exception e) {
E.printstacktrace ();
}
return Mycale.gettime ();
}

/**
* Gets the last day of the nth week of the month of the given date
*
* @return
*/
private static date Getlastdayofweek (date month, int week) {
Calendar Mycale = Calendar.getinstance ();
try{
GregorianCalendar GC = (GregorianCalendar) getcalendar (month, week);
Mycale.settime (Gc.gettime ());
Mycale.set (Calendar.date, Gc.get (calendar.date) + 8-gc.get (Calendar.day_of_week));
}catch (Exception e) {
E.printstacktrace ();
}
return Mycale.gettime ();
}


public static int getyearofdate (date date) {
if (date = = null) {
return 1990;
}
Calendar calendar = Calendar.getinstance ();
Calendar.settime (date);
Return Calendar.get (calendar.year);
}

public static int getmonthofdate (date date) {
if (date = = null) {
return 1;
}
Calendar calendar = Calendar.getinstance ();
Calendar.settime (date);
Return Calendar.get (Calendar.month) + 1;
}

public static int getdayofdate (date date) {
if (date = = null) {
return 1;
}
Calendar calendar = Calendar.getinstance ();
Calendar.settime (date);
Return Calendar.get (Calendar.day_of_month);
}

public static int Getcurrentmonth () {
Return Getmonthofdate (New Date ());
}

public static String Getcurrentmonthstr () {
return Getcurrentmonth () + "";
}

public static String getmonthofdatestr (date date) {
return Getmonthofdate (date) + "";
}

/**
* Get the maximum number of days for the month in which a date is
*
* @param date
* @return
*/
public static int Getmaxdaysofmonth (date date) {
Calendar calendar = Calendar.getinstance ();
Calendar.settime (date);
Return Calendar.getactualmaximum (Calendar.day_of_month);
}

}

Java Date-related formatting (ii)