It means that on newer JDKs, a wrapper class will be created automatically when a primitive type is used anywhere a reference type ... garbage collection and memory performance metrics. A quick ...

While the process works and has been available for quite some time, problems include: support for only primitive types and Java objects; no way to deterministically free memory; a limited ...

It's not very restrictive. However, rules are different from conventions. Java naming conventions for variables, methods and reference types are where things get a little more complicated. For example ...