java - how to check https using HttpURLConnection

I am trying to connect to a url with HttpUrlConnection. the host which user enter can be running on http:// or https://. when i am connecting it throws an exception as EOFException.
Is there any way that i identify that url is running on https through some error code or something ??

Following code i am using for this purpose.

HttpURLConnection.setFollowRedirects(true);
con = (HttpURLConnection) new URL(url[0]).openConnection();
con.setRequestMethod("POST");
con.setConnectTimeout(20000);

I m using the abode code what if the url is not valid like i type wwww.gooooooodldldle.com
which is not valid url. I am getting Java.net.SocketTimeout exception here

Answer

The URL cannot change after the connection has been created if you don't reacreate it again. I would do it like this to know the protocol.

URL url;
try {
    url = new URL(url[0]);
    if(url.getProtocol().equalsIgnoreCase(HTTPS){

        Lod.i(TAG, "Is HTTPS connection");
    } else {
        Log.i(TAG, "Is HTTP connection");
    }
} catch (EOFException eofEx) {
    eofEx.printStackTrace();
}

After update:

You can check the url string with a Regular Expresion and then if it's correct try the connection. Or put all the logic inside a try catch and show a toast or dialog if the exception is rised.

Hope it helps.