How to un-buffer StreamHandler?

Question

Help, searched for ~1 hour and couldn't find a solution.
I'm forking to another process with exec (this is Solaris fwiw) and then dumping output from exec program back to a TextArea. Works fine except the input is buffered and does not dump out in realtime as it would to stdout. It fills up the buffer, then dumps multiple lines, etc. How can I un-buffer it?
    private int systemCommand (String command, boolean waitFor) {
        int exitVal=0;
        try {
            Runtime rt = Runtime.getRuntime ();
            Process exCommand = rt.exec (command);
            StreamHandler errorHandler = new StreamHandler (exCommand.getErrorStream (), "ERROR");
            StreamHandler outputHandler = new StreamHandler (exCommand.getInputStream (), "OUTPUT");
            errorHandler.start ();
            outputHandler.start ();
            if (waitFor)
                exitVal = exCommand.waitFor ();
        } catch (Throwable t) {
            t.printStackTrace ();
        return exitVal;
    class StreamHandler extends Thread {
        InputStream is;
        String type;
        StreamHandler (InputStream is, String type) {
            this.is = is;
            this.type = type;
        public void run () {
            try {
                InputStreamReader isr = new InputStreamReader (is);
                BufferedReader br = new BufferedReader (isr);
                String line = null;
                while ((line = br.readLine ()) != null) {
                    System.out.println ("E:"+line);
                    OutputWindowText.append (">" + line + "\n");
                    OutputWindowText.setCaretPosition(OutputWindowText.getText().length());
            } catch (IOException ioe) {
                OutputWindowText.append ("IOException encountered.\n");
                ioe.printStackTrace ();

Answer 1

If I understand you, I don't think you can unless you change the forked process to write to a raw stream, not a buffered one.