How do I catch 'connection refused' exception in Java?

I want to know how I can catch a 'connection refused' exception in Java when I am using socket. (which would happen when server is down or not responding.)

Below is how I have implemented so far.

    try {
        sockfd = new Socket(host.getHostName(),heart_port);
        sockfd.setReuseAddress(true);
        BufferedReader message = new BufferedReader(new InputStreamReader ( sockfd.getInputStream() ) );
        message.close();
        sockfd.close();
    }开发者_运维知识库 catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

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Add ConnectException before IOException

catch (ConnectException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}