MAC Address In Java Example

Chapter: Networking Last Updated: 22-09-2018 08:33:53 UTC


            /* ............... START ............... */

public class JavaMacAddress {
	public static void main(String[] args) {

		InetAddress ip;
		try {
			ip = InetAddress.getLocalHost();
			System.out.println("IP address : " + ip.getHostAddress());
			NetworkInterface network = NetworkInterface.getByInetAddress(ip);
			byte[] mac = network.getHardwareAddress();
			System.out.print("MAC address : ");

			StringBuilder sb = new StringBuilder();
			for (int i = 0; i < mac.length; i++) {
				sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));

		} catch (Exception e) {

                /* ............... END ............... */


IP address :
MAC address : 80-86-F2-02-A0-2G


  • A media access control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment.
  • Java InetAddress class represents an IP address. The class provides methods to get the IP of any host name.
  • InetAddress.getLocalHost() returns the instance of InetAdddress containing local host name and address.
  • In the above program ip.getHostAddress() returns the IP address machine in string format.
  • NetworkInterface class represents a Network Interface made up of a name, and a list of IP addresses assigned to this interface. It is used to identify the local interface on which a multicast group is joined.
  • network.getHardwareAddress() gives the hardware address (usually MAC) of the interface.


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