FWD » Documentation

package test;

import java.io.PrintStream;

import java.net.InetAddress;

import java.net.NetworkInterface;

import java.util.HexFormat;

public class TestHost

{

   public static void main(String[] args)

   {

      int len = args.length;

      if (len <= 0)

      {

         System.out.println("Usage: java -cp . test.TestHost host1 [ host2 ...]");

         return;

      }

      PrintStream ps = new PrintStream(System.out, true);

      for (int i = 0; i < len; i++)

      {

         try

         {

            String host = args[i];

            ps.append("host = ").append(host).append("\r\n");

            InetAddress addr = InetAddress.getByName(host);

            ps.append("addr = ")

              .append(addr.toString())

              .append(", loopback=")

              .append(String.valueOf(addr.isLoopbackAddress()))

              .append(", wildcard_address=")

              .append(String.valueOf(addr.isAnyLocalAddress()))

              .append("\r\n");

            NetworkInterface nic = NetworkInterface.getByInetAddress(addr);

            ps.append("nic = ")

            .append(nic.toString())

            .append(", loopback=")

            .append(String.valueOf(nic.isLoopback()))

            .append(", virtual=")

            .append(String.valueOf(nic.isVirtual()))

            .append(", up=")

            .append(String.valueOf(nic.isUp()))

            .append(", mtu=")

            .append(String.valueOf(nic.getMTU()))

            .append(", had=")

            .append(nic.getHardwareAddress() != null ? HexFormat.of().formatHex(nic.getHardwareAddress()) : null)

            .append("\r\n");

         }

         catch(Throwable e)

         {

            e.printStackTrace(ps);

         }

      }

   }

}