Java Programming

This is the first time I've used Runtime.exec();

Here's the code:

 Runtime rt = Runtime.getRuntime();
          
            process = rt.exec(jobCommand);

            BufferedReader input = new BufferedReader(new InputStreamReader(process.getInputStream()));

            String line=null;

            while((line=input.readLine()) != null) {
            	System.out.println("OUTPUT: " + line);
            }

            int exitVal = process.waitFor();

        } catch(Exception e) {
        	e.printStackTrace();
        }//end catch

as you can see, this is just copied and pasted out of the standard example for this method.

When it gets to the line:
while((line=input.readLine()) != null)

it doesn't read anything. However, when i run the SAME exact command from the windows CMD prompt i get a ton of output.

what am i doing wrong here?

thanks.