How can I cancel tasks in ExecutorService?

How can I cancel tasks in ExecutorService?

You can cancel tasks in ExecutorService by using the cancel() method on the Future object returned by the task submission.

What happens if I cancel a task that is already running?

If you cancel a running task, it will not stop immediately. The task needs to check for the cancellation status and handle it appropriately.

Is there a way to check if a task was cancelled?

Yes, you can check if a task was cancelled by calling the isCancelled() method on the Future object.

Can I cancel multiple tasks at once?

You can cancel multiple tasks by iterating through a collection of Future objects and calling cancel() on each one.