Java get MAC ADDRESS

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
 
public class mac_address {
    
    public static void main(String[] args) {
        try {        
            InetAddress address = InetAddress.getLocalHost();
            
            /*
             * Get NetworkInterface for the current host and then read the
             * hardware address.
             */
            NetworkInterface ni = NetworkInterface.getByInetAddress(address);
            byte[] mac = ni.getHardwareAddress();
            System.out.println(Array.join(mac,""));
            /*
             * Extract each array of mac address and convert it to hexa with the
             * following format 08-00-27-DC-4A-9E.
             */
            for (int i = 0; i < mac.length; i++) {            
                System.out.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : "");
            }
            
        } catch (UnknownHostException e) {
            e.printStackTrace();    
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }    
}