java.lang: A collection of language-related classes, such as Object and String, organized in the java package’s lang subpackage; java.lang.ref: A collection of reference-related language classes ...

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...

I'm purely a Java guy, and we'll eventually get to a pure Java library, but in the meantime I'd like to test using something like JNA. I'm wanting to keep this under a linux environment.

A cleaner approach is to introduce a third-party Java library such as Google Guava or Apache Commons, both of which provide a Multimap class to address the issue. Multiple values per key with Apache ...