Sun Java

I got a pre-test ccnp from my friend . It’s build by Sun Java program. When I opened it in my computer, my system ID came out. And, I typed the passowrd that I got from my friend. But the password was invalid. I know that that password just belong to my friend’s system ID. So, what should I do to open that application. Please tell me the software which I can get the password from my system ID. Thank you very much