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I can use
ip = InetAddress.getLocalHost();
NetworkInterface.getByInetAddress(ip);
to obtain the mac address, but if I use this code in an offline machine it doesn’t work.
So, How can I get the Mac address?
With Java 6+, you can use
NetworkInterface.getHardwareAddress.Bear in mind that a computer can have no network cards, especially if it’s embedded or virtual. It can also have more than one. You can get a list of all network cards with
NetworkInterface.getNetworkInterfaces().