src/java.base/share/classes/java/time/chrono/JapaneseEra.java

*** 250,260 ****
       * is returned.
       *
       * @param style  the style of the text required, not null
       * @param locale  the locale to use, not null
       * @return the text value of the era, not null
-      * @since 9
       */
      @Override
      public String getDisplayName(TextStyle style, Locale locale) {
          // If this JapaneseEra is a supplemental one, obtain the name from
          // the era definition.
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