final char convertedChar = hankakuKatakanaToZenkakuKatakana(originalChar1);
                if (convertedChar != originalChar1) {
                    sb.setCharAt(i, convertedChar);
                }
            }
        }
        if (i < sb.length()) {
            final char originalChar1 = sb.charAt(i);
            final char convertedChar = hankakuKatakanaToZenkakuKatakana(originalChar1);