关于java：ExecutorService workStealingPool和cancel方法

ExecutorService workStealingPool and cancel method

您能想到为什么这个代码不能工作并且总是输出"finished"的任何原因吗？但是第二个示例工作时没有任何问题。我正在使用最新的JDK(8U45)。

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public static class MyClass implements Runnable {

@Override
public void run() {
try {
Thread.sleep(2000);
} catch (InterruptedException ex) {
System.out.println("Interrupted");
return;
}
System.out.println("Finished");
}

public static void main(String[] args) {
// spot the difference ->
ExecutorService executorService = Executors.newWorkStealingPool(4);
Future future = executorService.submit(new MyClass());
Thread.sleep(100);
future.cancel(true);
}
}

下面的例子完美无瑕：

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public static class MyClass implements Runnable {

@Override
public void run() {
try {
Thread.sleep(2000);
} catch (InterruptedException ex) {
System.out.println("Interrupted");
return;
}
System.out.println("Finished");
}

public static void main(String[] args) {
ExecutorService executorService = Executors.newSingleThreadExecutor();
Future future = executorService.submit(new MyClass());
Thread.sleep(100);
future.cancel(true);
}
}

号

编辑：增加了返回和更新的睡眠时间和另一个例子。