JAVA URL NÃO AUTENTICA

private static String obterPagina(String endereco, String userName, String passWord) {

        StringBuilder stringBuilder = new StringBuilder();

        try {
                      URL url = new URL(endereco);
            String userPassword = userName + : + passWord;
            String encoding = new sun.misc.BASE64Encoder().encode(userPassword.getBytes());
            URLConnection uc = url.openConnection();
            uc.setRequestProperty(Authorization, Basic  + encoding);
            InputStream content = (InputStream) uc.getInputStream();
            BufferedReader in =
                    new BufferedReader(new InputStreamReader(content));
            String line;
            while ((line = in.readLine()) != null) {
                stringBuilder.append(line).append(\n);
            }


            in.close();
        } catch (Exception e) {
            logger.error(e.getMessage());
        }
        return stringBuilder.toString();

    }

public class Autenticadora extends Authenticator
{
    private String user;
    private String passwd;

    public Autenticadora(String user, String passwd)
    {
        this.user = user;
        this.passwd = passwd;
    }

    @Override
    protected PasswordAuthentication getPasswordAuthentication()
    {
        return new PasswordAuthentication(user, passwd.toCharArray());
    }
}