JDK-8207152 : Placeholder for Japanese new era should be two characters
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.util:i18n
  • Affected Version: 7,8,11
  • Priority: P2
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2018-07-12
  • Updated: 2019-05-21
  • Resolved: 2018-07-12
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11 b23Fixed 7u221Fixed 8u211Fixed openjdk7uFixed
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Description
The implementation of JDK-8202088 holds "���������" as a placeholder for Japanese new era name.  However, the era name is restricted to be two characters by a cabinet report proclaimed in 1979 .  
https://www.digital.archives.go.jp/das/contents/pdf/lossy/H11B0001720000/069509831435.pdf

To achieve a smooth transition mentioned as a goal of JDK-8202088, two characters placeholder would be better.
Comments
From the API standpoint, there is no restriction on the length of a Era name (in fact, Japanese era names in English localization have more than 2 characters for existing eras). However, it would be desirable to avoid any possible unwanted regressions in customer's apps (even for placeholders), changing it to "������" would be desirable.
12-07-2018