class MyThread2 implements Callable {

    public String name;

    public MyThread2(String name) {

        this.name = name;

    }

    @Override

    public Object call() throws Exception {

        for (int i = 0; i < 4; i++) {

            System.out.println("这是线程" + this.name + "：" + i);

        }

        return name + "执行完成";

    }

}

public class ThreadDemo {

    public static void main(String[] args) {

        MyThread2 myThread1 = new MyThread2("线程A");

        MyThread2 myThread2 = new MyThread2("线程B");

        FutureTask futureTask1 = new FutureTask(myThread1);

        FutureTask futureTask2 = new FutureTask(myThread2);

        new Thread(futureTask1).start();

        new Thread(futureTask2).start();

        try {

            Object o1 = futureTask1.get();

            System.out.println(o1);

            Object o2 = futureTask2.get();

            System.out.println(o2);

        } catch (InterruptedException e) {

            e.printStackTrace();

        } catch (ExecutionException e) {

            e.printStackTrace();

        }

    }

}