What is object & class in java

What is Object ?

Object is real world entity having properties and behaviors .
Eg : Pen is an object .

• A pen can have properties like color, brand, height, and diameter, and a pen is used for writing purposes ( function/behavior of the pen).

• Object is an instance of class .

• Generally we create object with the help of new keyword .

• new is dynamic memory allocation operator .

• we can create more than one object of same class - no problem.

• It is a physical entity .

What is class ?

A class is blueprint of object from which objects are created .

• A class is nothing but a blueprint of a building. With that blueprint, we can create any number of buildings having the same structure.
• A class contains fields, blocks, constructors, methods, and so on.
• A class can not contain any executable Statement directly .
• we can create class with class keywords .
• Top level class either public or default .