【面试题】Callable使用

class Test implements Callable<Integer>{

    @Override
    public Integer call() throws Exception {
        System.out.println("Callable 方法执行了。。。");
        TimeUnit.SECONDS.sleep(5);
        return 1024;
    }
}

class Main {
    public static void main(String[] args) throws Exception{
        FutureTask<Integer> integerFutureTask = new FutureTask<>(new Test());
        Thread t1 = new Thread(integerFutureTask, "t1");
        t1.start();
        System.out.println("integerFutureTask.get()"+integerFutureTask.get());
    }
}
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