How to read from terminal stream in java GUI application?

I have a hardware system that will be writing to the terminal stream. I need to be able to monitor that stream for updates (writes) from my java application. How can I do this? I've only ever interacted with the terminal in a pure console application.

I could also write my application in .Net languages, so I'll accept answ开发者_如何学编程ers for .NET as well.

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If you launch the GUI program from command line, you get the terminal input stream with System.in.

If you don't, ther's no java way, in my opinion.