dns.java

import java.net.InetAddress;
import java.net.UnknownHostException;
public class dns {
public static void main(String[] args) throws UnknownHostException { InetAddress addr = InetAddress.getLocalHost();
System.out.println(
String.format(
"IP:%s hostname:%s canonicalName:%s",
addr.getHostAddress(), // The "default" IP address 
addr.getHostName(), // The hostname (from gethostname()) 
addr.getCanonicalHostName() // The canonicalized hostname (from resolver)
));
}}