What is the MAC address of your system?

Q. Write a Java progarm in order to check the MAC Address of your system.

Ans. 

import java.io.*;  

import java.net.*;

public class mac 

{

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) ? "-" : ""));

   }

   System.out.println(sb.toString());

  }

   catch (Exception e)

  {

   e.printStackTrace();

  }

 } 

}

Output: 

javac mac.java (//enter)
java mac (//enter)

IP address : 192.168.1.108
MAC address : 80-88-E2-02-C0-2F
 

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