| 510 |
|
|
| 511 |
|
/** |
| 512 |
|
* Attempts to cancel execution of this task. This attempt will |
| 513 |
< |
* fail if the task has already completed, has already been |
| 514 |
< |
* cancelled, or could not be cancelled for some other reason. If |
| 515 |
< |
* successful, and this task has not started when {@code cancel} |
| 516 |
< |
* is called, execution of this task is suppressed, {@link |
| 517 |
< |
* #isCancelled} will report true, and {@link #join} will result |
| 518 |
< |
* in a {@code CancellationException} being thrown. |
| 513 |
> |
* fail if the task has already completed or could not be |
| 514 |
> |
* cancelled for some other reason. If successful, and this task |
| 515 |
> |
* has not started when {@code cancel} is called, execution of |
| 516 |
> |
* this task is suppressed, {@link #isCancelled} will report true, |
| 517 |
> |
* and {@link #join} will result in a {@code CancellationException} |
| 518 |
> |
* being thrown. |
| 519 |
> |
* |
| 520 |
> |
* <p>After this method returns, subsequent calls to {@link |
| 521 |
> |
* #isDone} will always return {@code true}. Subsequent calls to |
| 522 |
> |
* {@link #isCancelled} will always return {@code true} if this |
| 523 |
> |
* method returned {@code true}. |
| 524 |
|
* |
| 525 |
|
* <p>This method may be overridden in subclasses, but if so, must |
| 526 |
|
* still ensure that these minimal properties hold. In particular, |
