Java(TM) Boutique - Tutorials - Unfreeze Your Applications with the New SwingWorker

Listing 1. From an ActionEvent to a background thread.

public void actionPerformed(ActionEvent event) {
  Thread thread = new Thread() {
    public void run() {
      executeLongOperation();
    }
  };
  thread.start();
}

private void executeLongOperation() {
  try {
    // synchronous
    SwingUtilities.invokeAndWait(new Runnable() {
      public void run() {
        statusLabel.setText("Starting long operation");
      }
    });
  } catch (InterruptedException e) {
    e.printStackTrace();
  } catch (InvocationTargetException e) {
    e.printStackTrace();
  }

  for (int i = 10; i >= 0; i--) {
    try {
      Thread.sleep(1000);

    } catch (InterruptedException e) {
    }
    final int secondsRemaining = i;
    // asynchronous
    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        statusLabel.setText("Completing in " + secondsRemaining);
      }
    });
  }
}

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