Page 49 - CA_Blue( J )_Class9
P. 49
3.5 DIFFERENCE BETWEEN CLASS AND OBJECT
Let’s learn how class and objects are different:
Class Object
Class is the blue print from which objects are created. Object is an instance of a class.
It is a logical entity that defines attributes and It is a physical entity that exists in memory.
behaviours.
No memory space is allocated when a class is created. Memory space is allocated when an object is created.
A class is defined once and can be used to create as An object is created each time it is instantiated from a
many objects as needed. class.
Let’s Revisit
The concept of class and object is obtained by programs written using object-oriented programming languages
such as Java, C++, etc.
A class consists of characteristics and behaviours.
Class is a non-primitive data types that act as a blueprint for creating objects of the same type.
To declare a class, we need "Access Specifier", "class" keyword, "name given to class", "Data members" and
Methods".
Objects are the instance of a class.
Components of Objects are: characteristics, behaviours, and the Object name.
MIND DRILL
Solved Questions
A. Tick ( ) the correct answer.
1. The entire program in Java is ………………… in class.
a. polymorph b. encapsulated
c. objects d. instance
2. A class consists of characteristics and behaviour which are used to create ………………….
a. basic structure b. programs
c. Objects d. Variables
3. Which of the following is called template used to create objects that share common characteristics and behaviour?
a. Instance b. Object
c. Class d. Methods
Elementary Concept of Objects and Classes 47

