How to use HttpClient 4.1 to login Twitter

[tambeo91]

I want to do something with twitter. but i can't login it by httpclient 4.1.
i just learn httplient so please help me.

HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost("https://twitter.com/sessions?phx=1");
//--- add name and pass to post method
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(4);
nameValuePairs.add(new BasicNameValuePair("session[username_or_email]", "*******"));
nameValuePairs.add(new BasicNameValuePair("session[password]", "50902349"));   
post.setEntity(new UrlEncodedFormEntity(nameValuePairs));        
//-- excute client
HttpResponse response = client.execute(post);
HeaderElementIterator H = new BasicHeaderElementIterator(response.headerIterator("Set-Cookie"));
String string = "";
// --- get all Set-Cookie
while(H.hasNext())
        {
        	HeaderElement element = H.nextElement();
        	string+=element.getName()+"="+element.getValue()+";";
        }        
System.out.println("----------------");
HttpPost Post_result = new HttpPost("http://twitter.com");
HttpClient Client_result = new DefaultHttpClient();
        // --- add header Cookie to post method
Post.setHeader("Cookie", string);
HttpResponse Response_result = Client_result.execute(Post_result);
HttpEntity entity = Response_result.getEntity();
        // print the page result but it can't login
System.out.print(EntityUtils.toString(entity));