怎样根据机器IP获得主机名！？

[thurdbird]

InetAddress类好象没有这功能！？

[Maxdell]

i did it.look at the code below:
---------------------------------
import java.net.*;
public class getHostname{
public static void main(String[] args)throws UnknownHostException{
InetAddress address=InetAddress.getLocalHost();
System.out.println(address); //print host IP
String hostname=address.getHostName(); //get host name
System.out.println(hostname); //print host name
}
}

[okwuzhijun]

import java.net.*;

public class WhoAmI {
public static void main(String[] args) throws Exception {
InetAddress a = InetAddress.getByName(args[0]);
byte[] b = {(byte) 192, (byte) 168, (byte) 128, 01};
InetAddress a = InetAddress.getByAddress(b);
System.out.println(a.getHostName());
System.out.println(a.getHostAddress());
}
}

[okwuzhijun]

在byte[] 数组中，元素的值大于127时就用(byte) 强制转换一下

[okwuzhijun]

sorry
请把这行代码删去
InetAddress a = InetAddress.getByName(args[0]);

[ipotang]

如果在局域网内，一个IP对应多个主机，有多个主机名，那如何？

[Maxdell]

import java.net.*;
public class getHostname{
public static void main(String[] args)throws UnknownHostException{

InetAddress[] hostname=InetAddress.getAllByName("www.163.com");
for(int i=0;i<hostname.length;++i)
System.out.println(hostname[i]);
}
}