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.

Classes and objects in Java must be initialized before they are used. You’ve previously learned that class fields are initialized to default values when classes are loaded, and that objects are ...

In my previous post, I looked at some of the problems associated with long parameters lists for methods and constructors. In that post, I discussed replacing primitives and built-in types with custom ...