Object in object-oriented programming

• • objects often model or simulate real-world things. 

  • Like real-world objects, an object has states/fields and behavior/responsibilities.

  • the state becomes fields or class variables, its behavior or responsibilities become class methods.

  • an object is a thing or entity that makes sense within the context of the problem

  • an object is an instance of a class

In object-oriented programming

• •  An object stores data and can perform actions and provide communication. 

  • The state of an object refers to the data it stores(class members or variables). 

  • The behavior of an object is defined by the action and communication it provides (methods).

Consider a "Rectangle" shape as an object.

A rectangle has length and width. A rectangle can set the values of its length and width, calculates its perimeter and area, and displays these information in a text (String) form.