Thread - jdialog etc

Question

Hi!
My good old problem still :(
So in a button's actionlistener I made a much-time-needed thing. During that I want to popup a jdialog that displays 'please-wait'. I made a thread, which gets the main-frame as a parameter, so in this thread I make a dialog, the main-frame as the owner, I put it modal etc. And when the much-time-needed thing stops, then I want the dialog to be closed etc. I made after much-time-needed source to .stop() the thread, but the jdialog is still there. I hope it's clear, help me asap plz :)
thanks,
athalay

Answer 1

.stop() shouldn't be used. It might not even work anymore. You need to create your first design in concurrency :) You will have to wait on some lock after you put the "please wait" screen. Your other Thread (could be the AWT) will then change a condition and notify.. (with notifyAll().. bad names ... another story) The waiting Thread. Past the wait loop will be the code to dispose of the dialog... sound fun? I think it is, I love concurrent designs.
// The processing Thread (could be in an AWT event)
new Thread(new Runnable() {
  pubic void run() {
    // I'm about to do a ton of processing
    new Thread( pleaseWait ).start();
    // I'm processing... la la la la
    // I'm done processing... la la la
    pleaseWait.endIt();  }
// somewhere else
pleaseWait = new Runnable() {
  boolean done = false;
  public void run() {
    // put up the dialog here
    while( !done ) {
      synchronized( this ) { // this is good for a lock :)
        wait();
    // if your here you are done... close the dialog
  public void endIt() {
    synchronized( this ) { // notice it's the same lock :)
     done = true;
     notifyAll();