Java reference objects make caching easy 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.

Here's how to make classes, fields, methods, constructors, and objects work together in your Java programs.

Java’s equals() and hashcode() are two methods that work together to verify if two objects have the same value. You can use them to make object comparisons easy and efficient in your Java programs.