volatile和synchronized的顺序反了

![image](https://user-images.githubusercontent.com/85894494/178698949-6a959bd2-5e04-4669-b551-71bf41cdb983.png)
![image](https://user-images.githubusercontent.com/85894494/178699148-8b82bd43-5135-4401-aae5-da2fa195535c.png)

地址：
>https://hollischuang.gitee.io/tobetopjavaer/#/basics/concurrent-coding/volatile