Most data types have a natural order. 1 comes before 2, a comes before b etc., So you might be wondering what’s the big deal about keeping things in order but when we are storing them in btree (or some sorted container) bunch of interesting details emerge in doing this efficiently. Database management system typically takes care of this, user simply defines the data types for each column and indicates which column(s) form the primary key for the table. This is used to store rows in the order defined by primary key so that later it can be searched efficiently to find what user is looking for.

Java has quite possibly one of the worst ways to interact with native methods using JNI (Java Native Interface). JNI APIs follow weird conventions and the language boundary interop is unbelievably cumbersome to deal with. Graal VM introduces a new way to cross language boundary that is easier to maintain and allows interop with any native library.