You need to keep a reference to your SwingWorker, then you use that reference to cancel the worker thread.
MySwingWorker myWorker = new MySwingWorkerClass(args).execute();
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
// Stop the swing worker thread
myWorker.cancel(true);
}
});
Here is a full example:
public class WorkerDemo extends JFrame {
private boolean isStarted = false;
private JLabel counterLabel = new JLabel("Not started");
private Worker worker = new Worker();
private JButton startButton = new JButton(new AbstractAction("Start") {
@Override
public void actionPerformed(ActionEvent arg0) {
if(!isStarted) {
worker.execute();
isStarted = false;
}
}
});
private JButton stopButton = new JButton(new AbstractAction("Stop") {
@Override
public void actionPerformed(ActionEvent arg0) {
worker.cancel(true);
}
});
public WorkerDemo() {
add(startButton, BorderLayout.WEST);
add(counterLabel, BorderLayout.CENTER);
add(stopButton, BorderLayout.EAST);
pack();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
class Worker extends SwingWorker<Void, Integer> {
int counter = 0;
@Override
protected Void doInBackground() throws Exception {
while(true) {
counter++;
publish(counter);
Thread.sleep(60);
}
}
@Override
protected void process(List<Integer> chunk) {
// get last result
Integer counterChunk = chunk.get(chunk.size()-1);
counterLabel.setText(counterChunk.toString());
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new WorkerDemo();
}
});
}
}