Method decode

lib/java/net/URIEncoderDecoder.java:184–214

Decodes the string argument which is assumed to be encoded in the x-www-form-urlencoded MIME content type using the UTF-8 encoding scheme. '%' and two following hex digit characters are converted to the equivalent byte value. All other characters are passed through unmodified. e.g. "

(String s)

     * @return java.lang.String The decoded version.
     */
    static String decode(String s) throws UnsupportedEncodingException {

        StringBuilder result = new StringBuilder();
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        for (int i = 0; i < s.length();) {
            char c = s.charAt(i);
            if (c == '%') {
                out.reset();
                do {
                    if (i + 2 >= s.length()) {
                        throw new IllegalArgumentException(Messages.getString(
                                "luni.80", i)); //$NON-NLS-1$
                    }
                    int d1 = Character.digit(s.charAt(i + 1), 16);
                    int d2 = Character.digit(s.charAt(i + 2), 16);
                    if (d1 == -1 || d2 == -1) {
                        throw new IllegalArgumentException(Messages.getString(
                                "luni.81", s.substring(i, i + 3), //$NON-NLS-1$
                                String.valueOf(i)));
                    }
                    out.write((byte) ((d1 << 4) + d2));
                    i += 3;
                } while (i < s.length() && s.charAt(i) == '%');
                result.append(out.toString(encoding));
                continue;
            }
            result.append(c);
            i++;
        }
        return result.toString();
    }

}