static class Task_StringUpdate extends SwingWorker<Void, String> {

   JLabel jlabel;
   public Task_StringUpdate(JLabel jlabel) {
       this.jlabel = jlabel;
   }

   @Override
   protected void process(List<String> chunks) {
       jlabel.setText(chunks.get(chunks.size()-1)); // The last value in this array is all we care about.
       System.out.println(chunks.get(chunks.size()-1));
   }

   @Override
   protected Void doInBackground() throws Exception {

       publish("Loading Step 1...");
       Thread.sleep(1000);
       publish("Loading Step 2...");
       Thread.sleep(1000);
       publish("Loading Step 3...");
       Thread.sleep(1000);
       publish("Loading Step 4...");
       Thread.sleep(1000);

       return null;
   }

   @Override
   protected void done() {
       try {
           get();
           JOptionPane.showMessageDialog(jlabel.getParent(), "Success", "Success", JOptionPane.INFORMATION_MESSAGE);
       } catch (ExecutionException | InterruptedException e) {
           e.printStackTrace();
       }
   }
}