Network Java Tutorial

Reading a Web resource's headers and content:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class MainClass {
  public static void main(String[] args) {
    try {
      URL url = new URL("http://www.rntsoft.com/");
      URLConnection urlConnection = url.openConnection();
      Map> headers = urlConnection.getHeaderFields();
      Set>> entrySet = headers.entrySet();
      for (Map.Entry> entry : entrySet) {
        String headerName = entry.getKey();
        System.out.println("Header Name:" + headerName);
        List headerValues = entry.getValue();
        for (String value : headerValues) {
          System.out.print("Header value:" + value);
        }
        System.out.println();
      }
      InputStream inputStream = urlConnection.getInputStream();
      BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
      String line = bufferedReader.readLine();
      while (line != null) {
        System.out.println(line);
        line = bufferedReader.readLine();
      }
      bufferedReader.close();
    } catch (MalformedURLException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}
Header Name:Content-Length
Header value:329495
Header Name:X-Powered-By
Header value:ASP.NET
Header Name:ETag
Header value:"30d67746a17c71:11e5"
Header Name:null
Header value:HTTP/1.1 200 OK
Header Name:Date
Header value:Fri, 26 Jan 2007 17:02:42 GMT
Header Name:Accept-Ranges
Header value:bytes
Header Name:Content-Type
Header value:text/html
Header Name:Server
Header value:Microsoft-IIS/6.0
Header Name:Last-Modified
Header value:Mon, 04 Dec 2006 06:04:11 GMT
Header Name:Content-Location
Header value:http://www.rntsoft.com/index.htm