Java不使用锁让两个线程顺序打印1~100

/**
*compareAndSet是原子操作。内部是unsafe实现的
*atomicInteger的作用就是用来做乐观锁的
*/
private final AtomicInteger atomicInteger = new AtomicInteger(0);

    private Integer num = 0;

    @Test
    public void test3() {

     //打印奇数
        new Thread(() -> {

            while (true) {

                while (atomicInteger.compareAndSet(0, 1)) {

                    num++;

                    System.out.println(num);

                    atomicInteger.compareAndSet(1,2);

                    if (num == 99) return;

                }

            }


        }).start();

   //打印偶数
        new Thread(() -> {


            while (true) {

                while (atomicInteger.compareAndSet(2, 3)) {

                    num++;

                    System.out.println(num);

                    atomicInteger.compareAndSet(3,0);

                    if (num == 100) return;

                }

            }


        }).start();

    }