Page 359 - CITS - Computer Software Application -TT

COMPUTER SOFTWARE APPLICATION - CITS

public static void main(String[] args) {
// call constructor with no parameter
Main obj1 = new Main();
// call constructor with a single parameter

Main obj2 = new Main(“Python”);
obj1.getName();
obj2.getName();
}
}

Output
Programming Language: Java
Programming Language: Python

Inheritance in JAVA

Inheritance in Java is a mechanism in which one object acquires all the properties and behaviors of a parent
object. It is an important part of OOPs (Object Oriented programming system).
The idea behind inheritance in Java is that you can create new classes that are built upon existing classes. When
you inherit from an existing class, you can reuse methods and fields of the parent class. Moreover, you can add
new methods and fields in your current class also.
Inheritance represents the IS-A relationship which is also known as a parent-child relationship.

Why use inheritance in java
• For Method Overriding (so runtime polymorphism can be achieved).
• For Code Reusability.
Terms used in Inheritance
• Class

A class is a group of objects which have common properties. It is a template or blueprint from which objects
are created.
• Sub Class/Child Class
Subclass is a class which inherits the other class. It is also called a derived class, extended class, or child
class.
• Super Class/Parent Class
Superclass is the class from where a subclass inherits the features. It is also called a base class or a parent
class.
• Reusability
As the name specifies, reusability is a mechanism which facilitates you to reuse the fields and methods of the
existing class when you create a new class. You can use the same fields and methods already defined in the
previous class.

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CITS : IT&ITES - Computer Software Application - Lesson 94 - 100