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Extract network card address with java net NetworkInterface

import java.net.NetworkInterface; import java.net.SocketException; import java.util.Arrays; import java.util.Enumeration; public class Main {   public static void main(String args[]) throws SocketException {     Enumeration<NetworkInterface> nets = NetworkInterface         .getNetworkInterfaces();     while (nets.hasMoreElements()) {       NetworkInterface netint = nets.nextElement();       System.out.println("Display name: " + netint.getDisplayName());       System.out.println("Hardware address: "           + Arrays.toString(netint.getHardwareAddress()));     }   } }