Running programs and grabbing their output

Question

I'm kinda confused. I want to run command.com from java and be able to capture its output and print it somewhere else, as well as insert my own input through another medium (ie. JTextField). I know i can use runtime to execute it, and then use process to get the output stream and input stream, but when i get the output stream, it returns it as an output stream, which would mean i couldnt actually read what the program was outputting, i could only write to it, which doesnt make sense at all. Will somebody please explain to me what i'm doing wrong, or if i dont have it wrong, please explain to me how to do what i want to do.
Thank you

Answer 1

The above posts seem to be right:
// Get the runtime. Replace 'this' with what you want from
Runtime rt = this.getRuntime();
// Intialize a variable for recieving the output
byte b[] = new byte[10000];
// Get a stream to recieve the output
InputStream outputOfRT = rt.getRuntime();
// Read the output. Use a better read() logic to all the stuff
read(b);
// Manipulate the b for what you want
rajesh