Day 6 - Dec 26

Ojects and Class:

Object:

-> Java is an object-oriented programming language. The core concept of the object-oriented approach is to break complex problems into smaller objects.

-> An object is a real-word entity that has state and behaviour. In other words, an object is a tangible thing that can be touch and feel, like a car or chair, etc. are the example of objects.

-> The banking system is an example of an intangible object. Every object has a distinct identity, which is usually implemented by a unique ID that the JVM uses internally for identification.

Characteristics of an Object:

State: It represents the data (value) of an object.

Behavior: It represents the behavior (functionality) of an object such as deposit, withdraw, etc.

Identity: An object's identity is typically implemented via a unique ID. The ID's value is not visible to the external user; however, it is used internally by the JVM to identify each object uniquely.

Object Definitions:

• An object is a real-world entity.


• An object is a runtime entity.


• The object is an entity which has state and behavior.


• The object is an instance of a class.

["An object is an instance of a class. A class is a template or blueprint from which objects are created. So, an object is the instance(result) of a class."]

What is a Class in Java?

-> A class is a group of objects which have common properties. It is a template or blueprint from which objects are created. It is a logical entity. It can't be physical.

A class in Java can contain:

-- https://www.programiz.com/java-programming/class-objects