JDK8的lambda表达式

//        匿名内部类的方式
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                System.out.println("线程1被执行");
            }
        };
        new Thread(runnable).start();

//        lambda表达式
        Runnable runnable1 = () -> {
            System.out.println("线程2被执行");
        };
        new Thread(runnable1).start();

//        将函数作为参数传递
        new Thread(() -> System.out.println("线程3被执行！")).start();
    }