// begin NTLM proxy configuration
try {
	HttpClient client = new HttpClient();
	String proxyAddress = "<proxy_ip>"; // eg "10.0.0.254" or "proxy"
	int proxyPort = <port>; // eg 8080
	String userName = "<valid_user_name>";
	String userPassword = "<valid_password>";
	String userDomain = "<valid_domain>";
	
	client.getHostConfiguration().setProxy( proxyAddress, proxyPort );
	Credentials creds = null;
	if ( userDomain == null ) {
		creds = new UsernamePasswordCredentials( userName, userPassword );
	} else {
		creds = new NTCredentials( userName, userPassword, Inet4Address.getLocalHost().getHostName(), userDomain );
	}
	if ( creds != null ) {
		client.getState().setProxyCredentials( proxyAddress, null, creds );
	}
}
catch (UnknownHostException e) {
	//TODO insert error handling of your choice here
	 e.printStackTrace();
}
// end NTLM proxy configuration