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  1. JDK
  2. JDK-8248695

HostLocaleProviderAdapterImpl provides invalid date-only

    Details

    • Subcomponent:
    • Introduced In Version:
      9
    • Resolved In Build:
      b06
    • CPU:
      x86_64
    • OS:
      windows_10

      Description

      ADDITIONAL SYSTEM INFORMATION :
      Windows 10, "Country or region" set to "Germany", "Regional format" set to "English (United States)", but customized to use 24-hour time and use yyyy-mm-dd date format.

      A DESCRIPTION OF THE PROBLEM :
      Setting the java.locale.providers property to HOST and using DateTimeFormatter#ofLocalizedDate yields an exception when the format method of this formatter is called. This seems to be because the date-only pattern includes the time pattern as well.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Run the provided source code.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Properly formatted date.
      ACTUAL -
      Exception in thread "main" java.time.temporal.UnsupportedTemporalTypeException: Unsupported field: HourOfDay
      at java.base/java.time.LocalDate.get0(LocalDate.java:709)
      at java.base/java.time.LocalDate.getLong(LocalDate.java:688)
      at java.base/java.time.format.DateTimePrintContext.getValue(DateTimePrintContext.java:308)
      at java.base/java.time.format.DateTimeFormatterBuilder$NumberPrinterParser.format(DateTimeFormatterBuilder.java:2704)
      at java.base/java.time.format.DateTimeFormatterBuilder$CompositePrinterParser.format(DateTimeFormatterBuilder.java:2343)
      at java.base/java.time.format.DateTimeFormatterBuilder$LocalizedPrinterParser.format(DateTimeFormatterBuilder.java:4762)
      at java.base/java.time.format.DateTimeFormatterBuilder$CompositePrinterParser.format(DateTimeFormatterBuilder.java:2343)
      at java.base/java.time.format.DateTimeFormatter.formatTo(DateTimeFormatter.java:1847)
      at java.base/java.time.format.DateTimeFormatter.format(DateTimeFormatter.java:1821)
      at Scratch.main(scratch.java:10)

      ---------- BEGIN SOURCE ----------
      import java.time.LocalDate;
      import java.time.format.DateTimeFormatter;
      import java.time.format.FormatStyle;

      class Scratch {
          public static void main(String[] args) {
              System.setProperty("java.locale.providers", "HOST");
              DateTimeFormatter formatter = DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL);
              // Yields a different exception when also using .withLocale(Locale.ENGLISH) but still fails.
              formatter.format(LocalDate.of(2020, 1, 1));
          }
      }
      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      The only workaround I can think of right now is not using the HOST locale provider.

      FREQUENCY : always


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            • Assignee:
              naoto Naoto Sato
              Reporter:
              webbuggrp Webbug Group
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              • Created:
                Updated:
                Resolved: