Reputation: 14411
My hosts file (C:\WINDOWS\system32\drivers\etc\hosts) has a bunch of IP Address to host name mappings:
# Switches
192.168.200.254 sw-con-ctrl
192.168.201.253 sw-con-ctrl-2
192.168.201.254 sw-con-ctrl-1
# 192.168.188.1 sw-con-ctrl-ylw-1
# 192.168.189.1 sw-con-ctrl-blu
192.168.190.62 access-console
# Routers
192.168.21.1 rtr1
192.168.22.1 rtr2
I am trying to find a way to convert from an IPAddress to the HostName programmatically through Java APIs.
Pseudocode:
IPAddress ip = new IPAddress("192.168.190.62");
String host = ip.getHost();
System.out.println(host); //prints "access-console"
Upvotes: 25
Views: 56380
Reputation: 131
import java.net.InetAddress;
import java.net.UnknownHostException;
public class Main02{
public static void main(String[]args) throws UnknownHostException{
InetAddress ia = InetAddress.getByName("46.228.47.114");
System.out.println(ia.getHostName());
}
}
Output :
ir2.fp.vip.ir2.yahoo.com
Upvotes: 0
Reputation: 406015
There are methods in the InetAddress
class for that. I think you'll want either getHostName
or getCanonicalHostName
, depending on your need.
Upvotes: 2
Reputation: 46
This works as the javadocs say only local when no reverse lookup is needed: If a literal IP address is supplied, only the validity of the address format is checked.
If someone know a way without using third party jars to do the remote lookup...
Upvotes: 2