Problems adding new method to an extending abstract class

[harukia]

In the program class:
...
URL url = new URL("http://www.google.com");
extURLConnection c = new extURLConnection(url.openConnection());
...
if (c.isConnected){
...

In URLConnection I cant access the attribute connected (that shows if i got a connection or not). so I want to add a method that return that attribute.

So I created a class called extURLConnection that extends URLConnection. As method connect() is abstract I must define this class as abstract. And this is here I get problems. Cause of this i cant initiate this class (as i written above). So how do I implement this isConnected method? Is it possible to do it in another way? I've read some thing about Interfaces, can it be done with that?

import java.net.*;
class DpURLConnection extends URLConnection{
DpURLConnection(URLConnection URLConn){
super(URLConn.getURL());
}

public boolean isConnected(){
return this.connected;
}
}

[Tolls]

You can't do this, at least not without writing your own versions of HttpURLConnection etc.

Why do you need to know about the connected flag? It's for internal use only.