JAVA得到网卡物理地址(Windows和Linux)

/*
* Test.java
*
* Created on 2007-9-27, 9:11:15
*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package test2;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
*
* @author hadeslee
*/
public class Test {

public static String getMACAddress() {

String address = "";
String os = System.getProperty("os.name");
System.out.println(os);
if (os != null) {
if (os.startsWith("Windows")) {
try {
ProcessBuilder pb = new ProcessBuilder("ipconfig", "/all");
Process p = pb.start();
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while ((line = br.readLine()) != null) {
if (line.indexOf("Physical Address") != -1) {
int index = line.indexOf(":");
address = line.substring(index   1);
break;
}
}
br.close();
return address.trim();
} catch (IOException e) {

}
}else if(os.startsWith("Linux")){
try {
ProcessBuilder pb = new ProcessBuilder("ifconfig");
Process p = pb.start();
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while((line=br.readLine())!=null){
int index=line.indexOf("硬件地址");
if(index!=-1){
address=line.substring(index 4);
break;
}
}
br.close();
return address.trim();
} catch (IOException ex) {
Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex);
}

}
}
return address;
}

public static void main(String[] args) {
System.out.println(""   Test.getMACAddress());
}
}