How to set proxy in application?

Question

I use jakarta common httpclient 3.1 to set the proxy but i dun't know the code is right or not
this the code
String proxy = "172.11.23.1";
int port = "8080";
String username  = "xyz";
String  userpass = "aaa@11"
HttpClient client = new HttpClient();
HostConfiguration hostConfig = client.getHostConfiguration();
hostConfig.setProxy(proxy, port);
Credentials defaultcreds = new UsernamePasswordCredentials("username","userpass");
client.getState().setProxyCredentials(AuthScope.ANY, defaultcreds);
client.setHostConfiguration(hostConfig);
client.getParams().setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, AuthPolicy.BASIC);How to check that the proxy is right and the setting already right?
for example if use HttpURLConnection we can use getResponseCode to check if the connection is error or not.
thx..

Answer 1

go to commons-httpclient-3.1\docs\tutorial.html. In the left hand side you will get a link named as " user guide" and under that "Authentication Guide" link. check it out.