import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Set;
import java.util.Iterator;

public class URLVerbindung {
	
	public static void main(String[] args) {
		try {
			URL url = new URL("http://www.javabeginners.de");
			
			URLConnection con = url.openConnection();
			con.connect();
			Set s = con.getHeaderFields().entrySet();
			Iterator<Object> iter = s.iterator();
			while(iter.hasNext()){
				System.out.println(iter.next());
			}
			
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}