Future 详解

Overview

public interface Future<V> {
    boolean cancel(boolean mayInterruptIfRunning);
    boolean isCancelled();
    boolean isDone();
    V get() throws InterruptedException, ExecutionException;
    V get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException;

Future 是一个还算是见的接口，我们看看究竟是怎么实现的。它有多个实现类，我们看下最为重要的

java.util.concurrent.FutureTask