TCPIP Client (handling specific exceptions)

I have a TCPIP client with following code.

Code:

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try {
        smtpSocket = new Socket("javabook", 22122);
        os = new DataOutputStream(smtpSocket.getOutputStream());
        is = new DataInputStream(smtpSocket.getInputStream());
        } catch (Exception ex) {
        System.out.println("Some error has occured");
        }

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I want to catch specific exceptions for Port and for hostname. Please advice.

It is always a wise idea to catch specific exceptions. Try the following:

Code:

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try {
    smtpSocket = new Socket("javabook", 22122);
    os = new DataOutputStream(smtpSocket.getOutputStream());
    is = new DataInputStream(smtpSocket.getInputStream());
    } catch (UnknownHostException e) {
        System.err.println("Don't know about host: hostname");
    } catch (IOException e) {
        System.err.println("Couldn't get I/O for the connection to: hostname");
}

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Thanks javagk.
I tested it and it works perfectly fine.

Thanks guys. It was helpful.
Just checked the Java docs and it says:

Code:

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public Socket(InetAddress address, int port)
Throws:
IOException - if an I/O error occurs when creating the socket.
SecurityException - if a security manager exists and its checkConnect method doesn't allow the operation.

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