Redirect output to jsh

Question

Hi there!
I am working on a simple java shell in Windows XP at the moment which simply parses an entered command and passes it to ProcessBuilder as a list.
It works ok - the process startsas expected - the only problem is I cannot see any output from the processes, nor can I figure out a way to redirect STDOUT to the running java shell from XP (which is what I really want).
Here is my code so far - as I said, it's fairly basic at the moment.
public class shell {
     public void start()throws java.io.IOException {
          String commandLine;
          BufferedReader console = new BufferedReader
          (new InputStreamReader(System.in));
          while(true)  {
               System.out.print("jsh>");
               commandLine = console.readLine();
               if(commandLine.equals(""))
                    continue;
               else process(commandLine);
                    continue;
     private void process(String cmd)
          String command = cmd;
          String[] commsplit = command.split("\\s");
          ProcessBuilder pb = new ProcessBuilder(Arrays.asList(commsplit));
          try {
          pb.start();
          catch (IOException ioe) {
               System.err.println("Unknown command or input. Please try again");
     public static void main(String[] args)throws java.io.IOException {
          shell shell1 = new shell();
          shell1.start();
}Any pointers in the right direction would be most appreciated.

Answer 1

You need to process the stdout and stderr of the Process. This http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html shows you how to do it safely!