Passing an instance is passing a function pointer. Along with a ton of other things, of course. Java introduced the concept of "single abstract method" types to do function pointer-like things.

Copying objects is a common Java programming operation that has one serious trap. Here's how to avoid copying from an object reference and only copy the instance and values you want. Copying objects ...

Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields, ...