package net;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class Dns {
public static void main(String args[]) {
print(getNumericAddress("www.fairfield.edu"));
System.out.println(getHostName("12.23.55.212"));
}
public static String getHostName(String s) {
try {
InetAddress ia = InetAddress.getByName(s);
return ia.getHostName();
} catch (UnknownHostException e) {
}
return null;
}
public static byte[] getNumericAddress(String name) {
InetAddress ia =
null;
try {
ia = InetAddress.getByName(name);
} catch (UnknownHostException e) {
}
return ia.getAddress();
}
public static void print(byte IP[]) {
for (int index = 0; index < IP.length; index++) {
if (index > 0) System.out.print(".");
System.out.print(((int) IP[index]) & 0xff);
}
System.out.println();
}
}