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    <p>Butterchicken's solution is ok, but will only work on english versions of Windows.</p> <p>A somewhat better (language independent) solution would be to match the pattern for MAC addresses. Here I also make sure that this address has an associated IP (e.g. to filter out bluetooth devices):</p> <pre><code>public String obtainMacAddress() throws Exception { Process aProc = Runtime.getRuntime().exec("ipconfig /all"); InputStream procOut = new DataInputStream(aProc.getInputStream()); BufferedReader br = new BufferedReader(new InputStreamReader(procOut)); String aMacAddress = "((\\p{XDigit}\\p{XDigit}-){5}\\p{XDigit}\\p{XDigit})"; Pattern aPatternMac = Pattern.compile(aMacAddress); String aIpAddress = ".*IP.*: (([0-9]*\\.){3}[0-9]).*$"; Pattern aPatternIp = Pattern.compile(aIpAddress); String aNewAdaptor = "[A-Z].*$"; Pattern aPatternNewAdaptor = Pattern.compile(aNewAdaptor); // locate first MAC address that has IP address boolean zFoundMac = false; boolean zFoundIp = false; String foundMac = null; String theGoodMac = null; String strLine; while (((strLine = br.readLine()) != null) &amp;&amp; !(zFoundIp &amp;&amp; zFoundMac)) { Matcher aMatcherNewAdaptor = aPatternNewAdaptor.matcher(strLine); if (aMatcherNewAdaptor.matches()) { zFoundMac = zFoundIp = false; } Matcher aMatcherMac = aPatternMac.matcher(strLine); if (aMatcherMac.find()) { foundMac = aMatcherMac.group(0); zFoundMac = true; } Matcher aMatcherIp = aPatternIp.matcher(strLine); if (aMatcherIp.matches()) { zFoundIp = true; if(zFoundMac &amp;&amp; (theGoodMac == null)) theGoodMac = foundMac; } } aProc.destroy(); aProc.waitFor(); return theGoodMac; } </code></pre>
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    1. POHow do I get the hosts mac address using Java 5?
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    1. USCarles Barrobés
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    1. COThis only works for Windows. Is there a better solution for getting OS independent MAC address?
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      1. USBuhake Sindi
    2. CONot in Java5, unless you rewrite this method to work in e.g. Unix and call one or the other based in system property "os.name". In Java6 you can. But the question is about Java5
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    3. COTrue, hence I'm iterating. This solution only works for JDK 5 in Windows but not other OS'es.
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