Executors and ThreadPoolExecutors

Hi,
I'm creating a Server-Client Open Connection Application using J2SE 1.6.
When i accepting connection from client, i need to use threads to process the Socket i accepted.

I'm confused in using Executors or ThreadPoolExecutors. Which one is better for an open connection application (client(s) might be stay connected for a long time period)? Or just use an ordinary Thread?

Thanks in advance.

If i remember correctly - Executor is an interface that implements ThreadPoolExecutor. In case you are referring to a specific implementation, please provide the exact class name