Class vs Object

What is a class?

A class is a blueprint or template from which objects are created.

What is an Object?

Object is an instance of a class that represents real world entity.

Here are some of the differences between a Class and an Object:


                   Object                                                                         Class
1. Object is an instance of a class                           A class is a blueprint or template from 
                                                                                which objects are created.

2. Object is an real-world entity such                     Class is a group of similar objects.
    as book, computer etc.

3. Object is a physical entity.                                  Class is a logical entity.

4. Objects are created many times.                         Class is defined only once.

5. Object is allocated memory when                      Class doesn't allocate memory when
    it is created.                                                         it is created.

6. There are many ways to create object. e.g.         There is only one way to define Class

• Using new operator                                       in java  using class keyword.
• using clone() method
• using deserialization

It is all about class and object.

Thanks!