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.

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 ...

That means instance variables are assigned as follows: Values for boolean are initialized to false. Values for floats and doubles are initialized to 0.0. Values for byte, short, ... Java's virtual ...