How to get the ip of the computer on linux through Java?

Question

How to get the ip of the computer on linux through Java ?

I searched the net for examples, I found something regarding NetworkInterface class, but I can\'t wrap my

Answer 1

It's not ok to just return the first non-loopback interface as it might have been created by some software like Parallels. It's a better bet to try fishing for the eth0.

static private InetAddress getIPv4InetAddress() throws SocketException, UnknownHostException {

    String os = System.getProperty("os.name").toLowerCase();

    if(os.indexOf("nix") >= 0 || os.indexOf("nux") >= 0) {   
        NetworkInterface ni = NetworkInterface.getByName("eth0");

        Enumeration ias = ni.getInetAddresses();

        InetAddress iaddress;
        do {
            iaddress = ias.nextElement();
        } while(!(iaddress instanceof Inet4Address));

        return iaddress;
    }

    return InetAddress.getLocalHost();  // for Windows and OS X it should work well
}