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Questions tagged [java-calendar]

An abstract class in Java that is used to convert an instance in time from Epoch to a specific date.

61 questions
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How to compare objects of LocalDate and Calendar class?

I am trying to compare dates from two object having different types. Is there any way to convert Calendar object to LocalDater or vice-versa? Thank you :) public class ABC{ public static void main(String args[]){ Calendar c1=…
Maulik Doshi
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What is difference between Java calendar vs Android calendar

I'm new to Android and I'm trying to get the current date but the Android Calendar class requires API 24. I need to support older device and the Time class is deprecated since API 22. The problem is how to get current date on API 23 and I solved it…
Islam Assem
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Get timezone of area with country code in Java

I have to pass a message (jms) with timezone info like (America/Los_Angeles) but I have only country name and code. If it possible get timezone info with Java code. Somewhere I read this: System.out.println(TimeZone.getTimeZone("US")); But its…
Manvi
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Inaccuracy/randomness in java Calendar.toInstant() and Instant.atZone (also Local/ZonedDateTime.ofInstant())

I was developing a part of code where I had to use existing api using Calendar API where I was using purely new API. Got some strange behavior in the conversion, see this example: SimpleDateFormat df = new…
domaru
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Get week span as pair of zero-based day-of-year (0-364 or 0-365) numbers in Java

I need to get week span: start of week (Mo) | end of week (Sun) in days of year. For example, for 5.9.2019, it should be 241-247 (days starting from 0). However, my method produces 250 | 249 public static Pair getWeekSpan(Timestamp…
Talos
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Java 8 Date API - Week of year is different for the same day but different time

For what I can only assume is a timezone issue, the following code yields different week of year values for the same day, but different times: Note, the code is written in Kotlin Example fun main(args: Array) { val…
Matthew Layton
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Converting Date String to ZonedDateTime

I'm receiving a query parameter date, as yyyy-MM-DD (2022-03-08). I want to conver this to java.util.Calendar / java.util.GregorianCalendar formmat. So my idea is converto: String -> ZonedDateTime -> Calendar. What I did: ZonedDateTime parsedDate =…
PlayHardGoPro
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2 answers

Java Calendar isn't showing correct HOUR_OF_DAY

I am using the Calendar class in java and am having trouble. I have this code Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("NZST")); System.out.println("Calendar.HOUR_OF_DAY = " +…
Simon Mitchell
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2 answers

Print 12 Month Year and the next 2 Years using Java

Already had an initial program for this one, I made the code as much shorter and precise as possible. But upon checking it seems that the next 2 years still prints 2018 and I am expecting 2019 and 2020. How can I possible dynamically prints the year…
遊星不動
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Setting values in calendar (java.util.Calendar)

I'm learning the Calendar class in Java and I am unable to understand the Set(Calendar.Day OF MONTH) method. Here it goes: import java.util.Calendar; import java.util.Date public class TestCalender { public static void main(String[] args) …
Roopa
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Android Calendar getFirstDayOfWeek bug

I want to get the first day of the week but I have a strange bug. If I use this code: Calendar cal = Calendar.getInstance(); cal.set(2017, 0, 1); cal.set(Calendar.DAY_OF_WEEK, cal.getFirstDayOfWeek()); DateFormat dateFormat =…
Louis
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java.util.Calendar not updating the timezone properly

The goal of this method is to take a utc date, convert it to the timezone specified and return the DateTimeValue object. However we recently found a bug with this method when using it with certain timezones. private static DateTimeValue…
owen gerig
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How to get previous/last Saturday for a given date in Java?

For example:- String fromDate="09/18/2020"; I want my actual fromDate to be last Saturday that is "09/12/2020" . Another example:- String fromDate="09/01/2020"; I want my actual fromDate to be last Saturday that is "08/29/2020" .
Lina
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Changing the Session Languge leads to "java.text.ParseException: Unparseable date

whenever I'm defining the timeframe being in German session language after changing to English lang. session (and vice versa) I'm getting the: java.text.ParseException: Unparseable date: "10.10.2018" Here is the fragment: Date startDateFormatted…
alexandru catanet
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how can you combine date and sql time into a single date time in java?

Using java Calendar how can you combine the start date, day and starttime? For example: If the start date is 9/8/2020. The day is 2 and the start time is 8:00 AM then how can we obtain a java date that is 9/9/2020 8:00 AM. Here is my unsuccessful…
kofhearts
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