How can I get remote computer logged in user using Java or JavaScript?

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Javascript

Java

networking

remote

Hi,

I have list of computers name and I need to find out if any user logged on to those computers. Is it possible using Java or Java Script without writing code on remote machine?

Currently I have code that pings to computer and tells whether its reachable or not but I need to find out if anyone logged in to those machines and who is logged in.

private String getStatus(String machineName) {
        String result = null;
        try {
            InetAddress inet = InetAddress.getByName(machineName);
            System.out.println("Sending Ping Request to " + machineName);

            boolean status = inet.isReachable(5000); //Timeout = 5000 milli seconds

            if (status) {
                result = "Reachable";
            } else {
                result = "Unreachable";
            }
        } catch (UnknownHostException e) {
             result = "Host does not exists";
        } catch (IOException e) {
             result = "Error in reaching the Host";
        }
        return result;
    }