Inheritance in Java
one class is allowed to inherit the features(fields and methods) of another class.
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.
Why use inheritance in java
For Method Overriding (so runtime polymorphism can be achieved).
For Code Reusability.
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.
The syntax of Java Inheritance
class Subclass-name extends Superclass-name
{
//methods and fields
}
In the terminology of Java, a class which is inherited is called a parent or superclass, and the new class is
called child or subclass.
Types of inheritance in java
On the basis of class, there can be three types of inheritance in java: single, multilevel and
hierarchical.
In java programming, multiple and hybrid inheritance is supported through interface only. We
will learn about interfaces later.
one class is allowed to inherit the features(fields and methods) of another class.
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.
Why use inheritance in java
For Method Overriding (so runtime polymorphism can be achieved).
For Code Reusability.
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.
The syntax of Java Inheritance
class Subclass-name extends Superclass-name
{
//methods and fields
}
In the terminology of Java, a class which is inherited is called a parent or superclass, and the new class is
called child or subclass.
Types of inheritance in java
On the basis of class, there can be three types of inheritance in java: single, multilevel and
hierarchical.
In java programming, multiple and hybrid inheritance is supported through interface only. We
will learn about interfaces later.
