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

Create packages, import packaged classes and interfaces into your programs, move packages, and encapsulate them in jar files.

The java.lang package contains classes that are fundamental to the design of the Java language. The most important classes are Object, which is the root of the class hierarchy, and Class, instances of ...

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.