How the client to detect the server has closed the socket?

Question

if the server closed the socket by an unnormal way, for example, closing the socket compulsively. Then the client will show the "IOException:java.net.SocketException: Connection reset" message,
how the client to avoid such an error message to the user/customer, I mean , what the client can deal with such a message?
where to put the dealing code?
try{ int receivedLength=in.read(receivedBytes);
}catch(SocketException e){
// put the code here? }
catch(IOException e){
}

Answer 1

Do you know how to prove it---"a socket read should
always always always have a timeout";As ejp said (IMHO ...) it's his opinion and doesn't need proof. I respect his opinion, but I often write code that doesn't set this.
Instead I use 2 threads per connection, and don't care if the read thread goes to sleep, since I can still write. If you only have one thread per connection, you better ensure that the read will end in a relatively short amount of time, even if your partner decides it's time to go for lunch.
how the length of this timeout will be? That is a business decision, it all depends on the expected time between received messages and is application dependent.
is it a field of the socket?If you are using blocking mode sockets you set this with setSoTimeout. If you are using non blocking mode NIO you specify it on the select call, although the soTimeout should also work there, although I've never tried that.