code: public static boolean isChineseCharacter(char c) {
          Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
          if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
              || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
              || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
              || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
              || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
              || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
              || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {
              return true;
          }
          return false;
      }
docs: 是中文字符吗?
  
  @param c
  待判定字符
  @return 判断结果