Fazer com o codigo preencha os campos de login e senha

import java.io.BufferedReader;  
    import java.io.DataOutputStream;  
    import java.io.InputStreamReader;  
    import java.net.HttpURLConnection;  
    import java.net.URL;  
    import java.net.URLEncoder;  
      
    public class login {  
         
        public void login(){  
            System.out.println("Fazendo a conexão...");  
        }  
         
        public void connect (String webp, String user, String pass) throws Exception{  
      
        URL url = new URL(webp);  
        String POST_CONTENT_TYPE = "application/x-www-form-urlencoded";  
      
    // Fazendo a conexao aqui.  
      
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();  
        conn.setDoInput(true);  
        conn.setDoOutput(true);  
        conn.setUseCaches(false);  
        conn.setRequestMethod("POST");  
        conn.setRequestProperty("Connection", "Keep-Alive");  
        conn.setRequestProperty("Authorization", "Basic" );  
        conn.setRequestProperty("Content-Type", POST_CONTENT_TYPE);  
        conn.setRequestProperty("Content-Type", "text/html; charset=iso-8859-1");  
        conn.setInstanceFollowRedirects(true);  
        HttpURLConnection.setFollowRedirects(true);  
      
      
      
      
    DataOutputStream dos = new DataOutputStream(conn.getOutputStream());  
      
    StringBuilder content = new StringBuilder(1024);  
          content.append("Email").append(URLEncoder.encode(user, "UTF-8"));  
          content.append("Passwd").append(URLEncoder.encode(pass, "UTF-8"));  
      
    dos.writeBytes(content.toString());  
    System.out.println(conn.getPermission());  
    System.out.println(conn.getResponseMessage());  
    System.out.println(conn.getRequestMethod());  
    System.out.println(conn.getResponseCode());  
    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(conn.getInputStream()));  
    String responeLine;  
      
      
    StringBuilder response = new StringBuilder();  
      
    while ((responeLine = bufferedReader.readLine()) != null)  
    {  
    response.append(responeLine + "\n");  
    }  
      
    System.out.println (response.toString());  
      
    dos.flush();  
    dos.close();  
        }  
          
        public static void main(String args[]) throws Exception{  
            login log = new login();  
            log.connect("https://accounts.google.com/ServiceLogin?hl=pt-BR&continue=http://www.google.com.br/", "usuario aqui", "senha aqui");  
        }  
      
    }