How Can I Get My External IP Address in Java?

Determining an External IP Address in Java

When running code on a local machine, retrieving the external IP address, as seen from outside the network, can be a challenging task.

Java's InetAddress class, as exemplified in the provided IPAddress class, can only fetch the local IP address. To overcome this limitation, consider the following approaches:

1. Remote Request:

   Use a website with code (e.g., in JSP) that utilizes the request.getRemoteAddr() method or other similar functions to capture the IP address of the incoming request.

2. Third-Party Services:

   Leverage existing services like Amazon Web Services (AWS) and others.

   import java.net.*;
   import java.io.*;
   
   URL whatismyip = new URL("http://checkip.amazonaws.com");
   BufferedReader in = new BufferedReader(new InputStreamReader(
                   whatismyip.openStream()));
   
   String ip = in.readLine(); // Fetch the IP address as a String
   System.out.println(ip);

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