https://blog.wongcw.com/2021/04/08/%e5%be%ae%e8%bb%9f%e7%99%bc%e5%b8%83%e5%85%b6%e9%96%8b%e6%ba%90java%e7%99%bc%e8%a1%8c%e7%89%88%e7%9a%84%e9%a0%90%e8%a6%bd%e7%89%88%e6%ba%90%e8%87%aaopenjdk/