此功能内置于 Character.UnicodeBlock 类。与日语相关的Unicode块的一些示例：

This functionality is built into the Character.UnicodeBlock class. Some examples of the Unicode blocks related to the Japanese language:

Character.UnicodeBlock.of('誰') == CJK_UNIFIED_IDEOGRAPHS
Character.UnicodeBlock.of('か') == HIRAGANA
Character.UnicodeBlock.of('フ') == KATAKANA
Character.UnicodeBlock.of('ﾌ') == HALFWIDTH_AND_FULLWIDTH_FORMS
Character.UnicodeBlock.of('！') == HALFWIDTH_AND_FULLWIDTH_FORMS
Character.UnicodeBlock.of('。') == CJK_SYMBOLS_AND_PUNCTUATION

但是，与往常一样，魔鬼在细节中：

But, as always, the devil is in the details:

Character.UnicodeBlock.of('Ａ') == HALFWIDTH_AND_FULLWIDTH_FORMS

其中 A 是全角字符。因此，这与上面的半宽Katakana フ属于同一类别。请注意，全宽 A 与正常（半角）不同 A ：

where Ａ is the full-width character. So this is in the same category as the halfwidth Katakana ﾌ above. Note that the full-width Ａ is different from the normal (half-width) A:

Character.UnicodeBlock.of('A') == BASIC_LATIN