How to get list of Local Interfaces on a machine?

**Henryosa** · 05-12-2009

Hi, I want the program which will explain me the methods to find out the total number of list of local interfaces which are available on a particular machine. If you have knowledge then please help me.

**Praetor** · 05-12-2009

Hi, for getting the list of local interfaces on a machine you need to use getNetworkInterfaces() method of java. And the program of this will be as follows:

Code:

import java.net.*;
import java.util.*;

public class Interfaced
 {
  public static void main(String[] args) throws Exception 
 {
    Enumeration enum = NetworkInterface.getNetworkInterfaces();
    while (enum.hasMoreElements()) 
   {
      NetworkInterface network = (NetworkInterface) enum.nextElement();
      System.out.println(network);               
    }
 }
}

**Katty** · 05-12-2009

Hi, you can use the following code to get list of Local Interfaces on a machine. Use it.

Code:

import java.net.*;
import java.util.*;

public class Linterface 
{
    public Linterface()
    {
        try 
        {
            Enumeration enum = NetworkInterface.getNetworkInterfaces();
            
            InetAddress iadd = InetAddress.getLocalHost();
            System.out.println("\nMachine Name : " + iadd.getHostName());
            System.out.println("Machine IP Address : " + iadd.getHostAddress());
             if(enum != null)
            {
                System.out.println("Local Interfaces ");                
                while(enum.hasMoreElements()) 
                {
                    NetworkInterface localIf = (NetworkInterface)(enum.nextElement());
                    
                    System.out.println("Interface Name : " + localIf.getName());
                    
                       Enumeration ifAddrEnum = localIf.getInetAddresses();
                    System.out.print("IP Addresses : ");
                    
                       while(ifAddrEnum.hasMoreElements())
                       {
                           InetAddress ifAddr = (InetAddress)(ifAddrEnum.nextElement());                           
                           System.out.print(ifAddr.toString() + " ");
                    }                       
                }                                    
           }
            else
            {
                System.out.println("No Local network interfaces were found");            
            }
        }
        catch(Exception e)
        {
            System.out.println ("Error : " + e);    
        }                            
    }                      
    public static void main(String[] args) 
    {
        Linterface localIf = new Linterface();
       }
}

**kelfro** · 05-12-2009

Hi, I am beginner in java and don't know what you are wanted to know, but if you are able to get the solution about this then give me that solution. So, that I am also able to know some new things to improve my knowledge. So, if anyone has the solution about this, please give that to me. I am also waiting for your reply.