GUI ..Process and threads

Question

Hi..Folks
Is it possible to read the output of a class by starting it as a separate thread in a GUI application?
Currently we follow this approach. We start the class as a separate process (passing in what ever parameters needed) in the GUI(using RunTime.exec()). Read the output.
But we need a reference to the class that is being started.
Is it possible to get a reference to the class?
Thanks in advance.

Answer 1

Thanks for your replies.
Oki this time i will be more specific..I want to start and read the output of a thread..So while the thread is executing I can hook in to the output stream and read the output simultaneously...Actually I came across this link [Convert a Java OutputStream to an InputStream|http://ostermiller.org/convert_java_outputstream_inputstream.html] ... which suggests some idea to it...But the code gives compilation error (the bold line) ..."Cannot refer to a non-final variable in inside an inner class defined in a different method"..I have attached the code..Any ideas?
Readin.java creates the thread and sends in the PipedInputStream to tt.java's putDataOnOutputStream() which writes to the stream back...
Readin.java
byte[] b = null;
           PipedInputStream in = new PipedInputStream();
           PipedOutputStream out ;
          try {
               out = new PipedOutputStream(in);
          } catch (IOException e) {
               e.printStackTrace();
            new Thread(
              new Runnable(){
                public void run(){
                  try {
                    *     new tt().putDataOnOutputStream(new PipedOutputStream(in));*
                    } catch (IOException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
            ).start();
           try {
               in.read(b);
          } catch (IOException e) {
               e.printStackTrace();
           String str = new String(b);
           System.out.println(str);
...          And the code for the other class is
... tt.java.....
public  void putDataOnOutputStream(ByteArrayOutputStream out){
          String str="test";
          try {
               out.write(str.getBytes());
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
     }