了解线程池

Question

我是java.util.concurrent套餐的新手，所以我想问一个建议。我需要在ThreadPool中评估一些操作，但我还需要取消并发评估。所以，我倾向于将ThreadPoolExecutor包装到Future<T>接口中。这是我试图做的：

public class PooledFutureTask implements Future<List<Integer>> {

    ExecutorService executor = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
    private boolean cancelled;
    List<Integer> result;

    public PooledFutureTask(List<Runnable> runnables) {
        for (Runnable r : runnables)
            executor.execute(r);
    }

    @Override
    public boolean cancel(boolean mayInterruptIfRunning) {
        if (executor.shutdownNow().size() > 0)
            return cancelled = true;
        return executor.isTerminated() || executor.isShutdown();
    }

    @Override
    public boolean isCancelled() {
        return cancelled;
    }

    @Override
    public boolean isDone() {
        return executor.isTerminated();
    }

    @Override
    public List<Integer> get() throws InterruptedException, ExecutionException {
        while(true) {
            if (executor.isShutdown())
                return result;
        }
    }

    @Override
    public List<Integer> get(long timeout, TimeUnit unit)
            throws InterruptedException, ExecutionException, TimeoutException {
        if (executor.awaitTermination(timeout, TimeUnit.MILLISECONDS))
            throw new TimeoutException();
        return result;
    }

}

但我不确定。难道你不能指出我错在哪里吗？

我正在使用Java7。