Java URLConnection .getHeaderFields ()

public Map < String , List < String >> getHeaderFields()

import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
import java.util.Set;
//w  w w  .ja v  a2  s  . c  om
public class Main {
    public static void main(String[] args) throws Exception {
        URL url = new URL("http://www.java2s.com/");
        URLConnection urlConnection = url.openConnection();
        Map<String, List<String>> headers = urlConnection.getHeaderFields();
        Set<Map.Entry<String, List<String>>> entrySet = headers.entrySet();
        for (Map.Entry<String, List<String>> entry : entrySet) {
            String headerName = entry.getKey();
            System.out.println("Header Name:" + headerName);
            List<String> headerValues = entry.getValue();
            for (String value : headerValues) {
                System.out.print("Header value:" + value);
            }
            System.out.println();
        }
    }
}