Java Mac Address Get getMacAddress()

Description

get Mac Address

License

Open Source License

Declaration

public static String getMacAddress()

Method Source Code


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

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.text.ParseException;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static String getMacAddress() {
        String mac = "";
        String os = System.getProperty("os.name");
        try {//from w w w  .  j av  a  2s.  c  o m
            if (os.startsWith("Windows")) {
                mac = windowsParseMacAddress(windowsRunIpConfigCommand());
            } else if (os.startsWith("Linux")) {
                mac = linuxParseMacAddress(linuxRunIfConfigCommand());
            } else if (os.startsWith("Mac OS X")) {
                mac = osxParseMacAddress(osxRunIfConfigCommand());
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }

        return mac.replaceAll("-", ":");
    }

    private static String windowsParseMacAddress(String ipConfigResponse) throws ParseException {

        String localHost = null;
        try {
            localHost = InetAddress.getLocalHost().getHostAddress();
        } catch (java.net.UnknownHostException ex) {
            ex.printStackTrace();
            throw new ParseException(ex.getMessage(), 0);
        }

        StringTokenizer tokenizer = new StringTokenizer(ipConfigResponse, "\n");
        String lastMacAddress = null;

        while (tokenizer.hasMoreTokens()) {
            String line = tokenizer.nextToken().trim();

            // see if line contains IP address
            if (line.endsWith(localHost) && lastMacAddress != null) {
                return lastMacAddress;
            }

            // see if line contains MAC address
            int macAddressPosition = line.indexOf(":");
            if (macAddressPosition <= 0)
                continue;

            String macAddressCandidate = line.substring(macAddressPosition + 1).trim();
            if (windowsIsMacAddress(macAddressCandidate)) {
                lastMacAddress = macAddressCandidate;
                continue;
            }
        }

        ParseException ex = new ParseException("cannot read MAC address from [" + ipConfigResponse + "]", 0);
        ex.printStackTrace();
        throw ex;
    }

    private static String windowsRunIpConfigCommand() throws IOException {
        Process p = Runtime.getRuntime().exec("ipconfig /all");
        InputStream stdoutStream = new BufferedInputStream(p.getInputStream());

        StringBuffer buffer = new StringBuffer();
        for (;;) {
            int c = stdoutStream.read();
            if (c == -1)
                break;
            buffer.append((char) c);
        }
        String outputText = buffer.toString();
        stdoutStream.close();
        return outputText;
    }

    private static String linuxParseMacAddress(String ipConfigResponse) throws ParseException {
        String localHost = null;
        try {
            localHost = InetAddress.getLocalHost().getHostAddress();
        } catch (java.net.UnknownHostException ex) {
            ex.printStackTrace();
            throw new ParseException(ex.getMessage(), 0);
        }
        StringTokenizer tokenizer = new StringTokenizer(ipConfigResponse, "\n");
        String lastMacAddress = null;

        while (tokenizer.hasMoreTokens()) {
            String line = tokenizer.nextToken().trim();
            boolean containsLocalHost = line.indexOf(localHost) >= 0;
            // see if line contains IP address
            if (containsLocalHost && lastMacAddress != null) {
                return lastMacAddress;
            }

            // see if line contains MAC address
            int macAddressPosition = line.indexOf("HWaddr");
            if (macAddressPosition <= 0)
                continue;

            String macAddressCandidate = line.substring(macAddressPosition + 6).trim();
            if (linuxIsMacAddress(macAddressCandidate)) {
                lastMacAddress = macAddressCandidate;
                continue;
            }
        }

        ParseException ex = new ParseException(
                "cannot read MAC address for " + localHost + " from [" + ipConfigResponse + "]", 0);
        ex.printStackTrace();
        throw ex;
    }

    private static String linuxRunIfConfigCommand() throws IOException {
        Process p = Runtime.getRuntime().exec("ifconfig");
        InputStream stdoutStream = new BufferedInputStream(p.getInputStream());

        StringBuffer buffer = new StringBuffer();
        for (;;) {
            int c = stdoutStream.read();
            if (c == -1)
                break;
            buffer.append((char) c);
        }

        String outputText = buffer.toString();
        stdoutStream.close();
        return outputText;
    }

    private static String osxParseMacAddress(String ipConfigResponse) throws ParseException {
        String localHost = null;

        try {
            localHost = InetAddress.getLocalHost().getHostAddress();
        } catch (java.net.UnknownHostException ex) {
            ex.printStackTrace();
            throw new ParseException(ex.getMessage(), 0);
        }
        StringTokenizer tokenizer = new StringTokenizer(ipConfigResponse, "\n");

        while (tokenizer.hasMoreTokens()) {
            String line = tokenizer.nextToken().trim();
            // see if line contains MAC address
            int macAddressPosition = line.indexOf("ether");
            if (macAddressPosition != 0)
                continue;
            String macAddressCandidate = line.substring(macAddressPosition + 6).trim();
            if (osxIsMacAddress(macAddressCandidate)) {
                return macAddressCandidate;
            }
        }

        ParseException ex = new ParseException(
                "cannot read MAC address for " + localHost + " from [" + ipConfigResponse + "]", 0);
        ex.printStackTrace();
        throw ex;
    }

    private static String osxRunIfConfigCommand() throws IOException {
        Process p = Runtime.getRuntime().exec("ifconfig");
        InputStream stdoutStream = new BufferedInputStream(p.getInputStream());
        StringBuffer buffer = new StringBuffer();
        for (;;) {
            int c = stdoutStream.read();
            if (c == -1)
                break;
            buffer.append((char) c);
        }
        String outputText = buffer.toString();
        stdoutStream.close();
        return outputText;
    }

    private static boolean windowsIsMacAddress(String macAddressCandidate) {
        Pattern macPattern = Pattern.compile(
                "[0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0 -9a-fA-F]{2}[-:][0-9a-fA-F]{2}");
        Matcher m = macPattern.matcher(macAddressCandidate);
        return m.matches();
    }

    private static boolean linuxIsMacAddress(String macAddressCandidate) {
        Pattern macPattern = Pattern.compile(
                "[0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0 -9a-fA-F]{2}[-:][0-9a-fA-F]{2}");
        Matcher m = macPattern.matcher(macAddressCandidate);
        return m.matches();
    }

    private static boolean osxIsMacAddress(String macAddressCandidate) {
        Pattern macPattern = Pattern.compile(
                "[0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0 -9a-fA-F]{2}[-:][0-9a-fA-F]{2}");
        Matcher m = macPattern.matcher(macAddressCandidate);
        return m.matches();
    }
}

Java Mac Address Get getMacAddress()

Description

License

Declaration

Method Source Code

Related