Dos cli in java

Greetings,
I am told that I have a tendency to provide too much information, so I will try not to. I have search these forums and the internet in general for what I am looking for and have not found it. I am looking for a dos cli in a java application.This will be part of a larger program. I do not want to emulate dos, nor do I want java to run some commands for me, nor do I want to open the program written in C++ that is distributed with widows (cmd.exe). I want to have the cli in java as an object. It should be able to run any thing that a regular command prompt is able to. Has anyone made or seen some code like this? Is it possible? If possible could someone provide some source code that would atleast get me started?

Such a thing wouldn't be easy to write. For example when the user types the command "cd hamburger" into your shell emulator, that has to change the current working directory in the emulator. Likewise when the user types the command "set hamburger=free" into your shell emulator, that has to update the list of environment variables which your emulator is keeping track of. Which it will have initialized by copying the list of environment variables from the environment when it started up.
All of that is pretty trivial. But when the user types the name of an executable, and you track that executable down using your emulator's version of the PATH environment variable, you have to make sure that when you run it, it runs in an environment containing your shell's version of the environment variables. And you're going to have to have a batch-file interpreter which works the same as the existing Windows one. Note that you can't just run a batch file in a different process because a batch file can change the environment variables of the CLI it runs in (i.e. in your emulator).
I'm sure the list goes on. And as already said, why would anybody go to all this effort just to duplicate the Windows shell? Okay, I can see somebody doing it for fun, but would they get all of the gotchas covered?

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Dos cli in java

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