CODEWITHSUNDEEP
javasocketsipinternal
iLoveC
iLoveC

Reputation: 97

How to get an internal IP address?

First of all my programming language is Java. I created a simple chat program using sockets. It works pretty good.

I tried it on my computer (localhost) between two terminal instances.

I want to try it out on my laptop, or on another computer. For this I need the client's internal IP address.

How to figure out client's internal IP address using Java?

I specially want to get it out with Java, not using CMD, or something like this. I mean - that's not just a constant string.

Upvotes: 1

Views: 4250

Answers (2)

lleite
lleite

Reputation: 156

In Java, there is a class InetAddress that represents IP Adress (and its corresponding host name, in some cases).

For example, let's get my IP address and my host name:

import java.net.InetAddress;

public class Main {

    public static void main(String[] args) {
        try {
            InetAddress i = InetAddress.getLocalHost();
            System.out.println(i);                  // host name and IP address
            System.out.println(i.getHostName());    // name
            System.out.println(i.getHostAddress()); // IP address only
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}


Output (in my case):

LLEITE/192.168.1.100
LLEITE
192.168.1.100

Upvotes: 5

Saurabh Ande
Saurabh Ande

Reputation: 427

Use the below code:

InetAddress ownIP=InetAddress.getLocalHost();
System.out.println("IP of my system is := "+ownIP.getHostAddress());`

Upvotes: 0

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