相关疑难解决方法(0)

(eth0,Loopback,wlan0)我的机器上有三个接口,我想使用Java-API来获取mac地址.

• 我用这个代码.

  Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();
      for (NetworkInterface netint : Collections.list(nets))
          displayInterfaceInformation(netint);
  }
  
  static void displayInterfaceInformation(NetworkInterface netint) 
    throws SocketException 
  {
      System.out.println("Display name: " 
         + netint.getDisplayName());
      System.out.println("Hardware address: " 
         + Arrays.toString(netint.getHardwareAddress()));
  }
  

  Run Code Online (Sandbox Code Playgroud)

• 但那个代码打印wlan0,loopback,但错过了eth0.

• 我的操作系统Ubuntu,任何帮助.

更新

• o/p(strace -f java Networks 2>&1| grep ioctl).. 空白(空).

• java -version

java版"1.7.0_21"Java(TM)SE运行时环境(版本1.7.0_21-b11)Java HotSpot(TM)64位服务器VM(版本23.21-b01,混合模式)

• strace ifconfig 2>&1 | grep ioctl

ioctl(4, SIOCGIFCONF, {80, {{"lo", {AF_INET, inet_addr("127.0.0.1")}}, {"wlan0", {AF_INET, inet_addr("192.168.1.101")}}}}) = 0
ioctl(5, SIOCGIFFLAGS, {ifr_name="eth0", ifr_flags=IFF_UP|IFF_BROADCAST|IFF_MULTICAST}) = 0
ioctl(5, SIOCGIFHWADDR, {ifr_name="eth0", …