Java - Quickest way to check if URL exists

Question

Hi I am writing a program that goes through many different URLs and just checks if they exist or not. I am basically checking if the error code returned is 404 or not. Howev

Answer 1

Try to ask the next DNS Server

class DNSLookup
{
    public static void main(String args[])
    {
        String host = "stackoverflow.com";
        try
        {
            InetAddress inetAddress = InetAddress.getByName(host);
            // show the Internet Address as name/address
            System.out.println(inetAddress.getHostName() + " " + inetAddress.getHostAddress());
        }
        catch (UnknownHostException exception)
        {
            System.err.println("ERROR: Cannot access '" + host + "'");
        }
        catch (NamingException exception)
        {
            System.err.println("ERROR: No DNS record for '" + host + "'");
            exception.printStackTrace();
        }
    }
}