这是我写一个程序，看看哪里出错了，我总是找不出错误。thxpackage net;
import java.net.*;
public class IPAddressSeek
{
 public IPAddressSeek()
 {
 super();
 }
 public static void main(String[] args)
 {
 InetAddress hostAddress;
 byte[] integer_address;
 if (args.length==0)
  {
  try
   {
    hostAddress=InetAddress.getLocalHost();
    integer_address=hostAddress.getAddress();
    System.out.println("The domain name of localhost is:nttt"+hostAddress.getHostname());
    System.out.println("The IPAddress of localHost in the form of standardDot is:nttt"+hostAddress.getHostAddress());
    System.out.println("The IPaddress of localhost in the form of 4_integer_byte is:nttt"+integer_address[0]+"t"+integer_address[1]+"t"+integer_address[2]+"t"+integer_address[3]);
   }catch(UnknowHostException e)
   {e.printStackTrace();}
  }else
  {
  try
   {
    hostAddress=InetAddress.getByName(args[0]);
    integer_address=hostAddress.getAddress();
    System.out.println("The domain name of localhost is:nttt"+hostAddress.getHostname());
    System.out.println("The IPAddress of localHost in the form of standardDot is:nttt"+hostAddress.getHostAddress());
    System.out.println("The IPaddress of localhost in  the form of 4_integer_byte is:nttt"+ integer_address[0]+"t"+integer_address[1]+"t"+  integer_address[2]+"t"+integer_address[3]);
   }catch(UnknowHostException e)
   {e.printStackTrace();}

  }
 }
}

God, you are lazy,

change "UnknowHostException" to "UnknownHostException"
change "getHostname" to "getHostName"