RequestConfig requestConfig =  RequestConfig.custom()
        .setTargetPreferredAuthSchemes(Arrays.asList(AuthSchemes.BASIC))
        .setProxyPreferredAuthSchemes(Arrays.asList(AuthSchemes.NTLM, AuthSchemes.DIGEST))
        .build();

CloseableHttpClient httpclient = HttpClients.createDefault();
try {
    HttpClientContext localContext = HttpClientContext.create();
    HttpGet httpget = new HttpGet("http://localhost/");
    CloseableHttpResponse response = httpclient.execute(httpget, localContext);
    try {
        System.out.println(response.getStatusLine());
        EntityUtils.consume(response.getEntity());
        AuthState targetAuthState = localContext.getTargetAuthState();
        if (targetAuthState.getAuthScheme() != null) {
            System.out.println("Target auth scheme: " +
                    targetAuthState.getAuthScheme().getSchemeName());
        }
        AuthState proxyAuthState = localContext.getProxyAuthState();
        if (proxyAuthState.getAuthScheme() != null) {
            System.out.println("Proxy auth scheme: " +
                    proxyAuthState.getAuthScheme().getSchemeName());
        }

    } finally {
        response.close();
    }
} finally {
    httpclient.close();
}