Return from a method at the end of a thread

Question

Hi all,
I've written a slideshow in a class implementing Runnable, overriding the run() method.
I want that my a method "startSlideShow()" returns when the task of the thread ends (the thread mainly display images).
I've tried the the join() method (see code below) but the displaying of the images doesn't occurs any more.
public class SlideShow extends JPanel implements Runnable {
    //The  main thread to run the slideshow
    Thread slideShowThread = new Thread(this);
     * Launch the slideshow
    public void startSlideShow() {
        //launch the slide show
        slideShowThread.start();
        //build and launch the listening of the end of the slideshow
        //prob : it freeze the displaying
       try {
            slideShowThread.join();
            System.err.println(" thread ENDED");
        } catch (InterruptedException ex) {
            System.err.println(ex+" thread was stopped");
        //this method SHOULD returns when the slideshow ended
public void run(){
//here is the slideshow code...
}I've tried several other piece of code but I didn't succeed to makes my startSlideShow() method returns when the run() method end.
Could you help ?
thank you

Answer 1

SlideShow slideShow = new SlideShow();
slideShow.setCompletionListener(new
ew CompletionListener() {
public void executionComplete(SlideShow source) {
//Execution will continue here when slideshow is
w is complete...
          Thread t = new Thread(slideShow);
          t.start();
/Kajok, thank you a lot for this. This fit my needs as the parent class of slideshow shouldn't be of a specific structure now. I will use this technic.
However, just a general remark about the threads and my wish to have a modal function.
You said that :
"As I told you, you should never ever block the AWT thread so you can't make it modal. UI programming is event driven.
and I agree. the point is that I wanted to do something like the JOptionPane set at modal.
Let's consider the jOptionPane as a metaphor (I don't want to implement my slideshow using optionPane, obviously...)
When we call a jOptionPane, we wait for an user action, then the jOptionPane returns (usually returning the results of the user action) :
value = JOptionPane.showOptionDialog(
                    contentPane,
                    "my question is",
                    "my title",
                    JOptionPane.YES_NO_OPTION, // need answer
                    JOptionPane.QUESTION_MESSAGE,
                    null, // default icon for message type
                    options,
                    options[1]); //default selected value);So I was thinking that it should have been possible make a class which display the slideshow and then retunrs, after a specific event, which is the end of the slideshow...like the structure of the JOptionPane do.
Thank for your useful answers,