import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
public class Main {
public static void main(String[] args) throws Exception {
URL url = new URL("http://www.google.com/index.html");
URLConnection connection = url.openConnection();
Map responseMap = connection.getHeaderFields();
for (Iterator iterator = responseMap.keySet().iterator(); iterator.hasNext();) {
String key = (String) iterator.next();
System.out.println(key + " = ");
List values = (List) responseMap.get(key);
for (int i = 0; i < values.size(); i++) {
Object o = values.get(i);
System.out.println(o + ", ");
}
}
}
}