Am I updating Swing component outside of EDT?
You're really close...
Try something like this instead.
SwingWorker worker=new SwingWorker(){ protected Object doInBackground() { try{ Thread.sleep(3000); }catch (InterruptedException ex){} return null; } // This is executed within the context of the EDT AFTER the worker has completed... public void done() { jLabel1.setText(jLabel1.getText()+"."); }};worker.execute();You can check to see if you're running in the EDT through the use of EventQueue.isDispatchingThread()
Updated
You could also use a javax.swing.Timer which might be easier...
Timer timer = new Timer(3000, new ActionListener() { public void actionPerformed(ActionEvent evt) { jLabel1.setText(jLabel1.getText()+"."); }});timer.setRepeats(false);timer.start();