Java mac地址问题

我想在局域网中获取另一台计算机的mac地址，我该怎么做？我正在使用JPCAP

 private void getPackage(JpcapCaptor captor)
  {
      try{
            IPPacket ip = (IPPacket)captor.getPacket();

            for(int a =0 ; a <found.size(); a++ )
            {
                  if(ip.dst_ip.equals(found.get(a)))
                      check = true;

            }

            if(!check)
            {
                 if(ip.dst_ip.isSiteLocalAddress())
                 {
                    host = ip.dst_ip.getHostName();
                      System.out.println("destination ip : " + ip.dst_ip +  " " + ip.dst_ip.getHostName());
                      System.out.println("Source ip : " + ip.src_ip +  " " + ip.src_ip.getHostName());


                                          found.addElement(ip.dst_ip);

                  }
             }

              check = false;
        }catch(Exception ex)
        {
            //Sys.alert("Error" ,"lobby exeption :" +  ex);
            //wegens null reverence exeption
        }
  }

private void getPackage（jpcaptor captor）
{
试一试{
IPPacket ip=（IPPacket）captor.getPacket（）；
对于（inta=0；a

您需要以下方法：

public java.lang.Object getSenderHardwareAddress（）

我希望它能起作用。我看不出能让该死的库列出我的接口。
package jpcapExample;
import jpcap.*;
import jpcap.packet.*;
class PacketPrinter implements PacketReceiver {
    public void receivePacket(Packet packet) {
        if (packet instanceof ARPPacket){
            ARPPacket arpp = (ARPPacket) packet;
            Object str = arpp.getSenderHardwareAddress();
            System.out.println("got arp from: " + str.toString());

        }
        System.out.println(packet);
        }
    }
---------------------[ different file ]-------------
    try {
    JpcapCaptor eth0=
        JpcapCaptor.
        openDevice(devices[eth0idx], 65535, false, 20000);
    while (true){
        eth0.processPacket(1233,new PacketPrinter());
    }
} catch (IOException io){
    io.printStackTrace();
}