程序读取MAC地址

import java.io.*;
public class ReadMAC {
  public static String physicalAddress = "read MAC error!";
  public ReadMAC() {
  }
  public static String checkPhysicalAddress(){
    try{
    String line;
    Process process = Runtime.getRuntime().exec("cmd /c ipconfig /all");
    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
    while ( (line=bufferedReader.readLine()) != null){
    if(line.indexOf("Physical Address. . . . . . . . . :") != -1){
    if(line.indexOf(":") != -1){
    physicalAddress = line.substring(line.indexOf(":")+2);
    break; // 找到MAC,推出循环
    }
    }
    }
    process.waitFor();
    }catch(Exception e){
    e.printStackTrace();
    }
    return physicalAddress;
  }
  public static void main(String[] args) {
  System.out.println("本机mac地址："+ReadMAC.checkPhysicalAddress());
  }
}