Java多线程创建之Callable（四）

public class Thread4 implements Callable {
    @Override
    public Integer call() throws Exception {
        int sum = 0;
        for (int i = 0; i < 10; i++) {
            sum += i;
            System.out.println(Thread.currentThread().getName() + i);
        }
        return sum;
    }

    public static void main(String[] args) throws ExecutionException, InterruptedException {
        Thread4 callable = new Thread4();
        FutureTask futureTask = new FutureTask(callable);
        Thread thread = new Thread(futureTask, "A线程");
        thread.start();
        System.out.println(futureTask.get());
    }
}

 callable创建call，可以通过FutureTask拿到返回值。