Scribd
Upload
47 views8 pages

Topics: Inheritance in Java

Inheritance in Java allows reusability of classes. A class can extend another class to inherit its properties, with the extended class called the subclass and extending class called the superclass. Java supports single inheritance by extending a single superclass and multiple inheritance by implementing multiple interfaces. While a class can only extend one superclass, it can implement multiple interfaces.

Uploaded by

pratham.sagittarus
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
47 views8 pages

Topics: Inheritance in Java

Inheritance in Java allows reusability of classes. A class can extend another class to inherit its properties, with the extended class called the subclass and extending class called the superclass. Java supports single inheritance by extending a single superclass and multiple inheritance by implementing multiple interfaces. While a class can only extend one superclass, it can implement multiple interfaces.

Uploaded by

pratham.sagittarus
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 8

Topics

• Inheritance in Java

1 Object-Oriented Programming Using Java


Inheritance Basics

• Reusability is achieved by Inheritance


• Java classes can be Reused by Extending a class. Extending an
existing class is nothing but reusing properties of the existing
classes.
• The class whose properties are extended is known as super or base
or parent class.
• The class which extends the properties of super class is known as
sub or derived or child class
• A class can either extends another class or can implement an
interface

2 Object-Oriented Programming Using Java


Java’s Support For Inheritance
• By Extending a Class
 Syntax
class class-name extends super-class-name
{
……..
}
• Example
class A
{
………
}// End of class A A <<super-class>>
class B extends A
{
……..
}// End of class B
B <<sub-class>>

3 Object-Oriented Programming Using Java


Java’s Support For Inheritance
• By Implementing an Interface
 Syntax
class class-name implements interface-name
{
……..
}
• Example
interface A
{
………
}// End of interface A A <<interface>>
class B implements A
{
……..
}// End of class B
B <<sub-class>>

4 Object-Oriented Programming Using Java


Forms of Inheritance
Single Inheritance Hierarchical Inheritance

A A X X

B B A B C A B C
Multiple Class Inheritance Multiple Interface Implementation
NOT SUPPORTED BY JAVA SUPPORTED BY JAVA
Multi-Level Inheritance Multiple Inheritance

A A
A B A B

B B

C C C C

5 Object-Oriented Programming Using Java


Multiple Inheritance in Java

• Java Does Not Support Multiple Inheritance by Extending


Multiple Classes

• The Following Code is Wrong

class A { } // End of class A


class B { } // End of class B
class C extends A, B
Wrong Java Does not
{ Allow Multiple Class
}// End of class C Extensions

6 Object-Oriented Programming Using Java


Multiple Inheritance in Java ….

• Java Supports Multiple Inheritance by Implementing Multiple


Interfaces

• The Following Code is Correct

interface A { } // End of interface A


interface B { } // End of interface B

class C implements A, B Java Allows Multiple


{ Interface
}// End of class C Implementations

7 Object-Oriented Programming Using Java


Thank You

8 Object-Oriented Programming Using Java

You might also like