gregorian-calendar

问题 I'm trying to use Joda library since count periods with Java native methods is a pain in the neck and all my attempts give unprecise results I have seen this sample to int n = Days.daysBetween(start.toLocalDate(), end.toLocalDate()).getDays(); since all my classes manage GregorianCalendar, I need that method that counts the days support GregorianCalendar, something like public int countDays(GregorianCalendar start, GregorianCalendar end){ //convert to joda start and end ... return Days

问题 Trying to use the GregorianCalendar, I got stuck on a singularity while computing the number of days since a particular date. In the scala interpreter, I entered : scala>import java.util.GregorianCalendar scala>import java.util.Calendar scala>val dateToday = new GregorianCalendar(2012,Calendar.MAY,22).getTimeInMillis() dateToday: Long = 1337637600000 scala>val days1 = (dateToday - (new GregorianCalendar(1976,Calendar.MARCH,28).getTimeInMillis())) / (1000*3600*24) days1: Long = 13203 scala>val

问题 I'm developing a webservice integrated with spring-struts web application, in XSD there is a XMLGregorianCalendar type property, let's say the property name is trxDate . In SOAPUI testing application, if I inserted the value of trxDate with: 2013-02-21 , then I sent the soap xml request data and I printed the value in service method with: System.out.println(trxDate) method, the printout result is same as inputted: 2013-02-21. Now, I'm trying to create a function to compare trxDate with

问题 I'm writing an application in Lua that calculates the sunset/sunrise, and to do this I had to convert the Gregorian date in to Julian days initially and do all the complex maths and such from there. I've completed the hard maths, but now I need to convert the Julian date (2456495.6833865 as an example) back to a Gregorian one, complete with the time. The only code I've found that can do this only has the day, year and month, but no mention of the time (which I believe is expressed as a

问题 I am making a driver to calculate various holidays in a given time span. So, I need to find the Gregorian dates of all the Chinese Holidays (Chinese New Year, QingMing Festival, Dragon Boat Festival, etc). I used the famous 'Easter algorithm' for Good Friday, Easter Monday, Ascension Day, and Whit Monday calculations; however, I don't understand it well enough to adapt it for the Chinese calendar. I have found similar questions, but they often go from Gregorian to Chinese: Moon / Lunar Phase

问题 is there a way of organising a number of days calculated by working out the difference between two dates, into different sections e.g. for 364 days it would be: 0 years, 11 months, 30 days, hours, minutes etc. I thought using logical operators may work like % and / but as different months have different amounts of days and some years are leap years i'm not sure how to do it. Any help would be much appreciated. My code: import java.util.*; public class CleanDate { public static void main

问题 How do you convert 2 dates one in BST(Current date) and the other in GMT so that they can be compared using the calendar date before() and after() methods? I don't know if BST is referring to British Summer Time. I am running on a laptop with English settings. I don't know how best to do the comparison to see if one is greater than the other or equals. I figure the timezone is the problem to me successfully using the calander date after() and before() methods. I was checking equality based on

问题 I received this exception while using GregorianCalendar java.lang.IllegalArgumentException: Bad class: class java.util.GregorianCalendar Who know how to fix, Please help me. p/s : I used the following code : Calendar someDate = GregorianCalendar.getInstance(); someDate.add(Calendar.DAY_OF_YEAR, -7); SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String formattedDate = dateFormat.format(someDate); UPDATED I should be use this line to achieve the date time : String

问题 So I been at this for a few hours now and it returns the correct Year, and Day but for some odd reason it returns the wrong month. I'm sure its a simple fix but I can't seem to figure it out. package gregoriancalendar; import java.util.GregorianCalendar; public class Calendar8_5 { public static void main(String[] args){ GregorianCalendar calendar = new GregorianCalendar(); System.out.println("Current Year, Month & Date: "); System.out.println("Year is " + calendar.get(1)); System.out.println(

问题 I know how to get the opposite. That is given a timezone I can get the timezone offset by the following code snippet: TimeZone tz = TimeZone.getDefault(); System.out.println(tz.getOffset(System.currentTimeMillis())); I want to know how to get the timezone name from timezone offset. Given, timezone offset = 21600000 (in milliseconds; +6.00 offset) I want to get result any of the following possible timezone names: (GMT+6:00) Antarctica/Vostok (GMT+6:00) Asia/Almaty (GMT+6:00) Asia/Bishkek (GMT