ZonedDateTime format and parsing exception-CodePudding

I have a problem with parsing zoned date time:

DateTimeFormatter format = DateTimeFormatter.ofPattern("yyyy-MM-ddzhh:mm");
ZonedDateTime.parse(s, formatter);

and error:

java.time.format.DateTimeParseException: Text '2022-05-24UTC12:15' could not be parsed at index 10

whats wrong with this code ?

thanks

CodePudding user response：

tl;dr – You have the wrong pattern…

The character z is not able to parse "UTC" because UTC is a Time Zone ID while zcan only parse time-zone-names according to the JavaDocs of java.time.DateTimeFormatter, here's the relevant part:

Symbol  Meaning                     Presentation      Examples
------  -------                     ------------      -------
(…)

V       time-zone ID                zone-id           America/Los_Angeles; Z; -08:30
z       time-zone name              zone-name         Pacific Standard Time; PST

(…)

That means you have to parse it using the character V, but you will have to put two of them (VV) or you will get a nice IllegalArgumentException with the following message:

java.lang.IllegalArgumentException: Pattern letter count must be 2: V

This all boils down to the following pattern:

DateTimeFormatter format = DateTimeFormatter.ofPattern("uuuu-MM-ddVVHH:mm");

which will be able to parse an input like "2022-05-24UTC12:15".

CodePudding user response：

Yes it's because of formatter pattern, i suggest to use the code below :

    final DateTimeFormatter format
            = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss z");

    ZonedDateTime zonedDateTime = ZonedDateTime
            .parse("2022-05-24 14:30:30 -01:00", format);
    
    System.out.println(zonedDateTime);