Java InetAddress class represents an IP address. The java.net.InetAddress class provides methods to get the IP of any host name for example www.rookienerd.com, www.google.com, www.facebook.com, etc.
An IP address is represented by 32-bit or 128-bit unsigned number. An instance of InetAddress represents the IP address with its corresponding host name. There are two types of address types: Unicast and Multicast. The Unicast is an identifier for a single interface whereas Multicast is an identifier for a set of interfaces.
Moreover, InetAddress has a cache mechanism to store successful and unsuccessful host name resolutions.
| Method | Description |
|---|---|
| public static InetAddress getByName(String host) throws UnknownHostException | it returns the instance of InetAddress containing LocalHost IP and name. |
| public static InetAddress getLocalHost() throws UnknownHostException | it returns the instance of InetAdddress containing local host name and address. |
| public String getHostName() | it returns the host name of the IP address. |
| public String getHostAddress() | it returns the IP address in string format. |
Let's see a simple example of InetAddress class to get ip address of www.rookienerd.com website.
import java.io.*;
import java.net.*;
public class InetDemo{
public static void main(String[] args){
try{
InetAddress ip=InetAddress.getByName("www.rookienerd.com");
System.out.println("Host Name: "+ip.getHostName());
System.out.println("IP Address: "+ip.getHostAddress());
}catch(Exception e){System.out.println(e);}
}
}
