An instance variable differs from a local variable in the nature of its scope and its lifetime. The entire class makes up the scope of an instance variable, not the method in which it was declared.

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 ...

In 1.7 we stopped caching the wrappers for Java objects that enter Ruby, and introduced warnings for two cases that could be affected: creating a singleton object from one of these wrappers setting ...