Java Mac Address Get getMacAddress()

Description

get Mac Address

License

Open Source License

Return

the fetched MAC address.

Declaration

public static String getMacAddress() 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.net.InetAddress;
import java.net.NetworkInterface;

public class Main {
    private static final String OS_NAME = System.getProperty("os.name");
    /**/*  w w w  .j  ava  2s . c  o  m*/
     * The MAC address.
     */
    private static String macAddress;

    /**
     * @return the fetched MAC address.
     */
    public static String getMacAddress() {
        if (macAddress == null) {
            try {
                fetchMacAddress();
            } catch (Exception e) {
                e.printStackTrace();
            }
            if (macAddress == null) {
                macAddress = "unknown";
            }
        }
        return macAddress;
    }

    /**
     * Fetch the MAC address.
     * @throws UnknownHostException
     * @throws SocketException
     */
    private static void fetchMacAddress() throws Exception {
        InetAddress ip = InetAddress.getLocalHost();
        NetworkInterface network = NetworkInterface.getByInetAddress(ip);
        if (network == null) {
            network = isLinux() ? NetworkInterface.getByName("eth0") : null;
        }
        byte[] mac = network.getHardwareAddress();
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < mac.length; i++) {
            sb.append(String.format("%02X%s", mac[i],
                    (i < mac.length - 1) ? "-" : ""));
        }
        macAddress = sb.toString();
    }

    public static boolean isLinux() {
        return OS_NAME.toLowerCase().contains("linux");
    }
}

Related

1. getMacAddr()
2. getMacAddress()
3. getMACAddress()
4. getMacAddress()
5. getMACAddress()
6. getMacAddress()
7. getMacAddress()
8. getMacAddress()
9. getMACAddress()