JDK-8220020 : java.util.Calendar.getDisplayName returns era name in English instead of Japanese name for style=LONG and Locale=JAPAN for CLDR as locale providers.
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.util:i18n
  • Affected Version: 8-pool
  • Priority: P3
  • Status: Resolved
  • Resolution: Cannot Reproduce
  • Submitted: 2019-03-03
  • Updated: 2019-08-01
  • Resolved: 2019-08-01
Related Reports
Relates :  
JDK-8217609 - New era placeholder not recognized by java.text.SimpleDateFormat
Description
java.util.Calendar.getDisplayName(int field, int style, Locale locale) returns era name in English instead of Japanese name. Below are the steps to reproduce the issue:-

Set JVM parameter java.locale.providers=CLDR

Calendar c = new Calendar.Builder()
            .setCalendarType("japanese")
            .setFields(ERA, 4, YEAR, 1, MONTH, MAY, DAY_OF_MONTH, 1)
            .build();

String eraName = c.getDisplayName(ERA, LONG, Locale.Japan);

Actual Result :- The value of eraName is "Heise"

Expected Result:- The value of eraName should be "������"


Root Cause of issue:-

The cause of issue is that CLDR java resource file (FormatData_ja.java) generated by "CLDR Converter" does not contain required resource key "japanese.long.Eras".  The "CLDR Converter" need to be fixed to address this issue.
Comments
Cannot reproduce with JDK14 code base. A lot of CLDR code has changed since JDK8 and this must be fixed along them. Unless some customer claims this should be fixed in JDK8, I would not expect it to be backported to JDK8.
01-08-2019