How to redirect i/o

Question

I have a gui that was originally designed just to print information to the screen that would normally be displayed in a normal CMD or Cygwin window. However, I now need to be able to provide input just like on the cmd line. For example, the code is running along and needs a password inorder to connect to a server so it prompts the user to type in the password. How can I capture this input and use it?
    private void runProcess() throws Exception {
        File workDir = new File("C:/cygwin/bin"); //"D:/BFAPPS/cygwin/bin");
        String[] cmdArray = new String[5];
        cmdArray[0] = "C:/cygwin/bin/bash"; //"D:/BFAPPS/cygwin/bin/bash";
        cmdArray[1] = "--login";
        cmdArray[2] = "-i";
        cmdArray[3] = "-c";
        cmdArray[4] = "cd " + build_path + "/deploy/scripts/deploymentscript" + " ;ant -f Deployment.xml all";
        for (int i = 0; i < cmdArray.length; i++){
            System.out.println(cmdArray);
Process p = Runtime.getRuntime().exec(cmdArray, null, workDir);
StreamPumper out = new StreamPumper(new InputStreamReader(p.getInputStream()), new OutputStreamWriter(System.out));
StreamPumper err = new StreamPumper(new InputStreamReader(p.getErrorStream()), new OutputStreamWriter(System.err));
StreamPumper in = new StreamPumper(new InputStreamReader(System.in), new OutputStreamWriter(p.getOutputStream()));
out.start();
in.start();
err.start();
p.waitFor();
out.join();
in.join();
err.join();
button3.setEnabled(true);
class StreamPumper extends Thread {
String line;
InputStreamReader input;
OutputStreamWriter output;
BufferedReader buffer;
BufferedWriter bw;
StreamPumper(InputStreamReader input, OutputStreamWriter output) {
this.input = input;
this.output = output;
buffer = new BufferedReader(input);
bw = new BufferedWriter(output);
setDaemon(true);
public void run() {
try {
while ((line = buffer.readLine()) != null) {
textArea1.append(line + "\n");
textArea1.setCaretPosition(textArea1.getDocument().getLength()); //I need to be able to 'read' input
          try {
Thread.sleep(50);
} catch(Exception e) {
e.printStackTrace(System.err);
}catch(IOException ioe) {
ioe.printStackTrace(System.err);
System.exit(1);

Answer 1

Read the following:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
It is full of information about the Runtime.exec and its varying effects and effectiveness.