Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

This post explains how to use classes in Java to build objects and organize your code. Also learn: constructors, static methods, and more!

Variable scope and lifetime. Developers implement instance variables to contain data useful to a class. An instance variable differs from a local variable in the nature of its scope and its lifetime.

Static methods are ones that aren't passed in any instance variables. As such, if you move static methods and static variables into a single utility class, you can look at the remaining properties and ...