java get mac address

 

import java.net.NetworkInterface;

 

public class Test {

public static void main(String[] args) throws Exception {

NetworkInterface ni = NetworkInterface.getByName("eth0");

byte[] b = ni.getHardwareAddress();

System.out.printf("MAC: %02X-%02X-%02X-%02X-%02X-%02X\n", b[0], b[1],

b[2], b[3], b[4], b[5]);

}

}