Java Program to find Computer name, IP Address and list all network interfaces

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Collections;
import java.util.Enumeration;

/**
 * Program to display current computer name, IP Address and network interfaces
 * 
 * @author sahir maredia (Kotia Solutions)
 * 
 */
public class ComputerName {

 /**
  * @param args
  */
 public static void main(String[] args) {
 try {

  InetAddress ipaddress = InetAddress.getLocalHost();
  System.out.println("Computer Host Name : "
    + ipaddress.getHostName());
  System.out.println("IP Address of Localhost : "
    + ipaddress.getHostAddress());

  // getting list of network interfaces
  Enumeration<NetworkInterface> interfaces = NetworkInterface
    .getNetworkInterfaces();

  System.out.println();
  System.out
    .println("================ Following are the available network interfaces ===============");
  System.out.println();
  if (interfaces == null) {
   System.out.println("No network interfaces found");
  } else {

   for (NetworkInterface netIf : Collections.list(interfaces)) {
    System.out.println("Display Name : "
      + netIf.getDisplayName());
    System.out.println("Name : " + netIf.getName());
    System.out.println();
   }
  }
 } catch (UnknownHostException ex) {
  System.out.println("Error Occured : " + ex.getMessage());
 } catch (SocketException e) {
  System.out.println("Error Occured : " + e.getMessage());
 }
 }

}

Run the program as follows :

sahir@sahir-laptop:~/temp/networklab$ javac ComputerName.java
sahir@sahir-laptop:~/temp/networklab$ java ComputerName
Computer Host Name : sahir-laptop
IP Address of Localhost : 127.0.1.1

================ Following are the available network interfaces ===============

Display Name : wlan0
Name : wlan0

Display Name : lo
Name : lo

sahir@sahir-laptop:~/temp/networklab$