I am trying to parse a date-time string that does not contain minutes 2019-10-12T07Z. When I run the above code, it throws the following exception stack trace Expected output Any idea what I should do? Answer You have to create custom DateTimeFormatter representing the time and offset. See that code run at Id…
Tag: java-time
Convert time from specific timezone to UTC (ColdFusion/Java)
We need to take a datetime string (which we’ve already received and validated from user form inputs), treat it as being specific to the America/New_York timezone, and convert it to UTC. We’re currently running ColdFusion 2018, which is limited in its native datetime functionality. So I wanted to t…
Why LocalDateTime formatted with zone offset?
Consider code: The output is 2022-05-04-17 while UTC time is 2022-05-04-10. The documentation says that LocalDateTime is without zone offset – so why there is 7 hour shift? (My local time zone is +7UTC) Answer You’ve called LocalDateTime.now(), which is documented as (emphasis mine): Obtains the c…
why nano seconds have to use int instead of long in java
I have been doing this exercise and this is the code Doesnt nanoseconds have to use long instead of int because the nanoseconds in the range? Answer That’s because like documentation says, we have a duration which consist of two fields, one is seconds and the other one is nanos. So when you ask for dura…
How to parse DateTime with Time between the dates?
I want to parse a date-time variant that has the time in between the dates. Why is the following not working? Result: java.time.format.DateTimeParseException: Text ‘Tue Mar 1 01:29:47 2022’ could not be parsed at index 4 Answer I think you have to make sure that you provide a specific Locale for a…
LocalDate.parse can’t parse the character on the last index wehere there is no character (nor empty space)
I have in my notepad file text: I checked is there any empty spaces, there is none. When I write: I receive an error: But there is no index 10! Why it thinks there is index[10]? Answer Trim possible whitespaces before parsing the date using String::trim:
Is this code realiable for working out hours in Java, considering summer time changes?
could someone pls help me solve this confusion? I need to display the total work hours for each worker. There are different work shifts. The most complex one, in this case, is the dawn-shift when the person works from 21:00 on a day to 7:00 on the next day, considering day offsets, i.e. on 31th October there …
Java Instant.parse cannot validate date
I have an instant field and trying to validate the values in this field using the following approach: Instant.parse(“2021-09-29 09:35:07.531”) However, it throws the error: java.time.format.DateTimeParseException: Text ‘2021-09-29 09:35:07.531’ could not be parsed at index 10. So, how …
Parse datetime with offset string to LocalDateTime
I am trying to parse following datetime String to LocalDateTimeObject, however I am not able to identify the format of the datetime string. Sat, 09 Oct 2021 02:10:23 -0400 How should I determine the pattern of the above string? Answer You should first check if the date string matches any of the Predefined For…
Inject Date or LocalDate into SQL query via jdbcTemplate.query?
I had a simple query like: I injected a LocalDate into query: Everything worked fine. After I moved my project with IDE to another PC, without any alterations, it started to throw exception: I can use a workaround via converting LocalDate to Date: but it does not seem right to me: I want to know the reason. W…