Get local machine Internet IP address

Question

Hi all,
I want to get the internet IP address (from ISP) of my computer. But my computer already has a internal IP address. How can I get the Internet IP instead of Internal IP?
I tried :
InetAddress mNet = InetAddress.getLocalHost();
String t = mNet.getHostAddress();
But the IP is Internal once.
Here is the infomration when I run ipconfig :
0 Ethernet adapter :
IP Address. . . . . . . . . : xxx.xxx.xxx.xxx
Subnet Mask . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . : xxx.xxx.xxx.xxx
1 Ethernet adapter :
IP Address. . . . . . . . . : 0.0.0.0
Subnet Mask . . . . . . . . : 0.0.0.0
Default Gateway . . . . . . :
2 Ethernet adapter :
IP Address. . . . . . . . . : xxx.xxx.xxx.xxx
Subnet Mask . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . :
Remark : 0 Ethernet adapter is Internet IP, 2 Ethernet adapter is Internal IP
Thanks!

Answer 1

Hi,
This code should print all the IP addresses from the local machine:
import java.net.*;
public class TestIP {
     public static void main(String args[]) {
          try {
               InetAddress[] addresses;
               addresses = InetAddress.getAllByName(InetAddress.getLocalHost().getHostName());
               for (int i=0; i<addresses.length; i++) {
                    System.out.println(addresses.getHostAddress());
          catch(UnknownHostException e) {
               System.out.println (e.getMessage());
Hope this helps,
Kurt.