code: public static JapaneseEra[] values() {
          JapaneseEra[] known = KNOWN_ERAS.get();
          return Arrays.copyOf(known, known.length);
      }
docs: Returns an array of JapaneseEras.
  <p>
  This method may be used to iterate over the JapaneseEras as follows:
  <pre>
  for (JapaneseEra c : JapaneseEra.values())
  System.out.println(c);
  </pre>
  
  @return an array of JapaneseEras