I'm looking to run command programatically Follow

I'd like to have my plugin use the CLI to perform various build and scaffolding tasks.

I'd like the end user to see the command and it's ouptut.

What's the best way to achieve this?

My first stab was to use this:
public static String execCmd(String cmd) throws java.io.IOException {
        Process proc = Runtime.getRuntime().exec(cmd);
        java.io.InputStream is = proc.getInputStream();
        java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
        String val = "";
        if (s.hasNext()) {
            val = s.next();
        }
        else {
            val = "";
        }
        return val;
    }

This works as designed.  How should I take that output and display it to the user?

Should I be using exec or some other built in mechanism?