One of the features that make Java so powerful, is its object-oriented structure. This means that Java uses classes and objects to create more scalable, modular, and organized code.

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

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.

In Java, nested classes are categorized as either static member classes or inner classes. Inner classes are non-static member classes, local classes, or anonymous classes.