Github user jmetertea commented on the issue:
https://github.com/apache/jmeter/pull/431
According to https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html
It should be replaced by
` clazz.getDeclaredConstructor().newInstance()`
But for generalizing, see
https://stackoverflow.com/questions/53257073/java-9-replace-class-newinstance---
