public class CallableDemo
{
    public static void main(String[] args) throws InterruptedException, ExecutionException
    {
        FutureTask<Integer> ft = new FutureTask<Integer>(new MyThread());
        new Thread(ft, "AA").start();
        new Thread(ft, "BB").start();
        System.out.println(Thread.currentThread().getName()+"***********我是上课主线程");
        Integer result01 = ft.get();
        System.out.println("******result01: "+result01);

    } 
}

class MyThread implements Callable<Integer>
{
    @Override
    public Integer call() throws Exception
    {
        System.out.println("**********call() ****");
        //Thread.sleep(4000);
        return 1018;
    }
}