Well I did it. I had this problem before on this thread and was looking for a solution,
https://www.rune-server.ee/runescape...computers.html
I was able to figure it out so here's how you can do it.
1. Set up a network connection between the two (or more) computers by initializing it with the computer you will run the server on.
2. Open command prompt and type ipconfig on the server computer when the network is on. Get the IP address for IPv4 Address ...... : 192.168.137.1 for example.
3. Open ClientConstants.java in and find this code public final static String[] SERVER_IPS =
4. Add the IP address that you noted down in step 2 as the first element of the array.
5. While your in ClientConstants.java set LOCALHOST = false so it will actually use the IP address and not 127.0.0.1
6. Now recompile and give the client to your other computer(s) by USB or whatever.
7. Launch server and launch client and you should be good.
(Note, if you want to launch client on the server computer as well you should set LOCALHOST to true on server computer but false on the others).
The hardest part of this is getting the network connection working. I have a sony vaio on windows 7. I went to Control Panel > Network and Internet then opened Intel(R) My WiFi Technology and enabled the connection. Then I gave it a name and password and connected to it on another laptop. There is also the adhoc option if you just search "adhoc" on your computer. This is more difficult and requires manual entering of IP addresses. I haven't had success with this one yet. You can also try cable to cable with a cross link cable (which is different from standard ethernet cables mind you). Some computers may have firewalls that will need to be bypassed.
Good luck hope this helps, if you have difficulties message me and I will try my best to help. This should also work for other servers as well just different places to change the IP address and what not.