Getting the IP address of the current machine using Java

Question

I am trying to develop a system where there are different nodes that are run on different system or on different ports on the same system.

Now all the nodes create

Answer 1

Since my system (like so many other systems) had various network interfaces.InetAddress.getLocalHost() or Inet4Address.getLocalHost() simply returned one that I did not desire. Therefore I had to use this naive approach.

InetAddress[] allAddresses = Inet4Address.getAllByName("YourComputerHostName");
        InetAddress desiredAddress;
        //In order to find the desired Ip to be routed by other modules (WiFi adapter)
        for (InetAddress address :
                allAddresses) {
            if (address.getHostAddress().startsWith("192.168.2")) {
                desiredAddress = address;
            }
        }
// Use the desired address for whatever purpose.

Just be careful that in this approach I already knew that my desired IP address is in 192.168.2 subnet.