lambda表达式和匿名内部类

示例：

public class MultiThread {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        MultiThread multiThread = new MultiThread();
//        FutureTask<Integer> futureTask = new FutureTask<>(new Callable<Integer>() {
//            @Override
//            public Integer call() throws Exception {
//                int i = 0;
//                for (; i < 100; i++) {
//                    System.out.println(Thread.currentThread().getName() + "的循环变量i的值：" + i);
//                }
//                return i;
//            }
//        });
        FutureTask<Integer> futureTask = new FutureTask<>( (Callable<Integer>) ()-> {
            int i = 0;
            for ( ; i < 100; i++) {
                System.out.println(Thread.currentThread().getName() + "的循环变量i的值：" + i);
            }
            return i;
        });
        for (int j = 0; j < 100; j++) {
            System.out.println(Thread.currentThread().getName() + "的循环变量j的值：" + j);
            if (j == 10) {
                new Thread(futureTask, "有返回值的线程").start();
            }
        }
        System.out.println("子线程的返回值：" + futureTask.get());
    }
}