Throwing Exceptions from a new Thread

Question

Please help if you can.........
I have a very simple RMI server, that is used to run processes in seperate threads on a server machine, that are kicked off by a client GUI.
All works fine, except if the process can not be found, then the server generates an IOException. How can I get the thread to throw the exception back to the RMI Server, and then back to the GUI.
I have tried to throw Runtime Exceptions but that did not work, and I can not declare the run method of the thread to throw a remote exception......
Any help would be most appriciated...
G

Answer 1

/* the listener interface */
public interface ExceptionListener {
  void exceptionOccured(Throwable t);
/* the runnable object */
public class WorkerThread implements Runnable {
  List exceptionListenerList;
  public void addExceptionListener(ExceptionListener l) {
    exceptionListenerList(l);
  public void run() {
    try {
    // do the work, e.g some JDBC stuff
    } catch(Throwable t) {
      // error occured, first do some logging, then notify all listeners
      t.printStackTrace();
      for(i=0; i<exceptionListenerList; i++) {
        (ExceptionListener)exceptionListenerList.get(i).exceptionOccured(t);
/* this clas creates and & runs the thread; before doing this it
registers itself as an ExceptionListener to the runnable object */
public class ThreadStarter implements ExceptionListener {
  public final void exceptionOccured(Throwable t) {
    // do whatever you want to do with the exception
  public final void startThread() {
    WorkerThread wt = WorkerThread();
    wt.addExceptionListener(this);
    new Thread(wt).start();
}By the way: I "borrowed" the ExceptionListener / ExceptionCallback idea from the book "java thread programming - the authorative solution" by paul hyde.