Friday, November 22, 2002 04:32 PM
This is probably lower lever access to your network card drivers than Java can provide. You will have to check your network card library documentation to see if it will tell you if it has a live cable.
If you do want to use java, just periodically try to hit some IP that you know is there - like your DNS controller. If you can't hit it, then your connection was broken sometime between this time and the last time that you checked. You will not get notified right away though, it takes time for the connection to time out.