Java the difference of Socket and ServerSocket in using port

Question

At the server side, we use

Socket server = serverSocket.accept();

to create a socket. After the socket is created, we can create a new thr

Answer 1

A ServerSocket can simply be seen as a Socket factory for incoming connections. For every incoming client connection, the ServerSocket.accept() method returns a new Socket to communicate with that and only that client on.

In other words, any number of connections (limited only by the OS) can be made to the single ServerSocket, and each client connection will get a separate Socket to communicate on, all communicating using the same server side TCP port.