utilisation de swingworker

Class x implements ActionListener {
 SwingWorker swingWorker;
 JButton b = new JB...
 d.addActionListener(this);
 
 public void actionPerformed(ActionEvent e){
   object source = e.getSource();

  if(source.equals(b)){
   swingWorker = new SwingWorker<Null, Void>(){
    @Override
    public void doInBackground() {
     //actions...
     return null;
    }

    };
  } else if(...){
  .
  .
  .
  }
  swingWorker.execute();
 }
.
.
.
}