Download The write up here
/import java.net.*;import java.util.*;
public class IPDemo
{
public static void main(String[] args){
String host;
Scanner ch = new Scanner(System.in);
System.out.print("1.Enter Host Name \n2.Enter IP address \nChoice=");
int choice = ch.nextInt();
if(choice==1)
{
Scanner input = new Scanner(System.in);
System.out.print("\n Enter host name: ");
host = input.nextLine();
try {
InetAddress address = InetAddress.getByName(host);
System.out.println("IP address: " + address.getHostAddress());
System.out.println("Host name : " + address.getHostName());
System.out.println("Host name and IP address: " + address.toString());
}
catch (UnknownHostException ex) {
System.out.println("Could not find " + host);
}
}
else
{
Scanner input = new Scanner(System.in);
System.out.print("\n Enter IP address: ");
host = input.nextLine();
try {
InetAddress address = InetAddress.getByName(host);
System.out.println("Host name : " + address.getHostName());
System.out.println("IP address: " + address.getHostAddress());
System.out.println("Host name and IP address: " + address.toString());
}
catch (UnknownHostException ex) {
System.out.println("Could not find " + host);
}
}
}
}
/*OUTPUT
iotlab@iotlab-Veriton-M200-B360:~$ javac IPDemo.java
iotlab@iotlab-Veriton-M200-B360:~$ java IPDemo
1.Enter Host Name
2.Enter IP address
Choice=1
Enter host name: www.google.com
IP address: 172.217.160.196
Host name : www.google.com
Host name and IP address: www.google.com/172.217.160.196
iotlab@iotlab-Veriton-M200-B360:~$ java IPDemo
1.Enter Host Name
2.Enter IP address
Choice=2
Enter IP address: 8.8.8.8
Host name : dns.google
IP address: 8.8.8.8
Host name and IP address: dns.google/8.8.8.8
iotlab@iotlab-Veriton-M200-B360:~$
*/
