Putting the Server and the Client Together
At this point, your asynchronous server and client programs are ready. You need to use the following steps to run the server and the client.
Running the Server Application
Run the AsyncEchoServerSocket class as listed in Listing 5-16. You should get a message on the standard output as follows:
Server is listening at localhost/127.0.0.1:8989
If you get the above message, you need to proceed to the next step. If you do not get the above message, it is most likely that the port 8989 is being used by another process. In such a case, you should get the following error message:
java.net.BindException: Address already in use: bind
If you get “Address already in use” error message, you need to change the port ...
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