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 ...

What is the contract between equals() and hashcode()? Learn how these methods work together when comparing objects in Java.

Reference objects aren't just useful when memory is at a premium; they can also be used to provide slick caching abilities to any application.

Okay, I've got two objects. There's the Hand object, and the Finger object. These are fake. The mappings are correct, I believe, everything works fine usually, I think I'm just misunderstanding ...