Java APIs

Dear All,

I have dynamic page and I can access contents using following code.

connection = new URL("http://www.example.com/test.php").openConnection();
                Scanner scanner = new Scanner(connection.getInputStream());
                scanner.useDelimiter("\\Z");
                content = scanner.next();

But this webpage is dynamic (content is keep updating by time).

How can I display the incremental HTML without downloading all HTML everything.