Trying to stop swingworker

Question

I have a custom JDialog that pops up when my SwingWorker thread fires up. The dialog just has a JProgressbar and a Button (cancel button). I am trying to figure out how to c

Answer 1

You should call

worker.cancel(true); //this will set the cancel flag of the worker

Then, when you invoke isCancelled() this will return true. So, you Can check this state in your loop

Answer 2

As explained in the official documentation, you need to check isCancelled() in your SwingWorker callback method.

Answer 3

Your cancel button should call the SwingWorker#cancel method

final SwingWorker worker = ...;

btn_Cancel.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
    worker.cancel( true );
  }
});

In your worker, you have to make sure to check the cancel flag

SwingWorker worker = new SwingWorker<String, Void>() { 
  @Override
  protected String doInBackground() throws Exception {
    while ( !isCancelled() ) {
      //do your stuff
    }
  }
}

Note that you need to create the worker before you create your ActionListener

Answer 4

You could call

worker.cancel(true);

in your button action listener?