我有一个Future,我想知道它的状态是什么。我想到的是这样的代码:
try {
    // Is that a good idea? Counting on exceptions looks weird.
    future.get(0, TimeUnit.MICROSECONDS);
    this.status = DONE;
} catch (InterruptedException e) {
    Thread.currentThread().interrupt();
    throw Throwables.propagate(e);
} catch (ExecutionException e) {
    this.status = FAILED;
} catch (TimeoutException e) {
    this.status = RUNNING;
} catch (CancellationException e) {
    this.status = CANCELED;
}
看起来FutureTask会尝试持有锁,如果它可以得到锁将检查Future状态。所以这似乎是个好主意。
有没有我在这里遗漏的陷阱?