Use ThreadLocalConcurrent to Replace Random and Math.random

ThreadLocalRandom is a combination of ThreadLocal and Random classes, which is isolated to the current thread. Thus, it achieves better performance in a multithreaded environment by simply avoiding any concurrent access to the Random objects.

https://www.baeldung.com/java-thread-local-random

I also had a conversation with a Oracle Java engineer that indicated that ThreadLocalRandom is preferable with new development.