This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
If you are beginning Java, please write your own Layout code, and don't rely on the tools with NetBeans.
If you want a list of teams, set up those teams names as an array (or List) and iterate through the array and set up radio buttons as anonymous objects. That way you can have sensible results if you change the number of teams suggested.
And welcome to JavaRanch
subject: How to do this - DataInputStream/DataOutputStream