That we can use objects as instance variables (String is an object). This is called Composition. If we think of an object as a machine, the instance variables represent the gears. We don’t want to expose …

An object is an "actor" or self-contained software unit that often corresponds to a real world entity and, therefore, running an object-oriented program is like performing a simulation of the real world.

Encapsulation: Combining an object’s data and functions into a single unit while protecting it, like a box that safeguards its contents from misuse unless accessed properly.

Chapter 1 Thinking Ob ject-Orien ted Although the fundamen tal features of what w eno w call ob ject-orien ted program- ming w ere in v en ted in the 1960's, ob ject orien ted languages really came to …

What is an object? an object is a software bundle of related fields (variables) and methods. In OOP, a program is a collection of objects that act on one another (vs. procedures).

In short,a class is a blueprint for an object.When you instantiate an object,you use a class as the basis for how the object is built.In fact,trying to explain classes and objects is really a chicken-and-egg …

The basic unit of abstraction is the OBJECT, which encapsulates both state information (in the form of the values of instance variables) and behavior (in the form of methods, which are basically procedures.)