(replying to appropriate aliases, instead of generic jdk9-dev alias)
Hi Clément,
The locale data, where those time zone names are derived from, have been
switched to use Unicode Consortium's CLDR, instead of the ones that are
previously used prior to JDK9. So there will be some differences you may
encounter. However it seems not right to parse "AKST" to SystemV time
zone. I'd appreciate it if you file a JIRA issue for this.
In the mean time, you can revert to the JDK8 behavior by setting the
system property "-Djava.locale.providers=COMPAT" to the command line.
HTH,
Naoto
On 10/10/17 7:37 PM, Clément Guillaume wrote:
Hello,
When parsing a date time string that contains a time zone like AKST, AKDT,
HST or AST with a DateTimeFormatter built from a pattern containing 'z',
java 9 returns the SystemV variant of those timezone, which then behave
differently as the "modern" ones. Looks like it's also an issue with long
time zone ("Alaska Standard Time")
From my digging I noticed that the PrefixTree generated
by ZoneTextPrinterParser.getTree is different in java 8 and java 9, and
this may be caused by a different order in the content returned
by TimeZoneNameUtility.getZoneStrings(Locale.getDefault())
Is this an expected behavior of java 9? (other american time zones are
parsed to the modern version: PST -> America/Los_Angeles)
I tested it with java 9 build 9+181 and java 8 build 1.8.0_131-b11 (both
linux 64 with en_US as local) on this code:
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.time.temporal.TemporalAccessor;
public class Main{
public static void main(String[] args){
DateTimeFormatter timezoneFormatter = DateTimeFormatter.ofPattern("z");
TemporalAccessor temporalAccessor = timezoneFormatter.parse("AKST");
System.out.println(temporalAccessor);
temporalAccessor = timezoneFormatter.parse("AKDT");
System.out.println(temporalAccessor);
temporalAccessor = timezoneFormatter.parse("HST");
System.out.println(temporalAccessor);
temporalAccessor = timezoneFormatter.parse("AST");
System.out.println(temporalAccessor);
DateTimeFormatter isoFormatter =
DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mmX").withZone(ZoneOffset.UTC);
temporalAccessor =
DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSz").parse("2017-09-13T06:30:33.123AKST");
System.out.println(temporalAccessor);
System.out.println(isoFormatter.format(temporalAccessor));
temporalAccessor =
DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSVV").parse("2017-09-13T06:30:33.123America/Anchorage");
System.out.println(temporalAccessor);
System.out.println(isoFormatter.format(temporalAccessor));
}
}
