https://blog.wongcw.com/2018/12/17/openjdk-%e4%bb%a3%e7%a2%bc%e8%a2%ab%e6%8c%87%e5%90%ab%e6%9c%89%e5%a4%aa%e5%a4%9a%e7%9a%84%e9%ab%92%e8%a9%b1/