retrieving the workgroup name of a computer running windows operating system

I am currently working on my final year project at the University. I am developing a LAN messager program in JAVA. I would like to use the computer names as the usernames and the workgroups as the chatroom names. So far I don't have problems retrieving the computer names but the problem is with retrieving the workgroup names. Any assistance will开发者_StackOverflow be highly appreciated. Thank you in advance.

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On my machine I have a System property env.USERDNSDOMAIN which holds my DNS domain.

I also have a System property env.USERDOMAIN which seems to hold my Windows domain name.

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After some googling, I found out you can access the Windows registry by using java.util.prefs.Preferences. Finding out where in the registry to look can be your homework :^)