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Subscribe on YouTubeWhat is Inheritance in Java?
Inheritance in Java is a core Object-Oriented Programming (OOP) mechanism where one object acquires all the properties (fields) and behaviors (methods) of a parent object.
It represents the IS-A relationship (also known as a Parent-Child relationship). With inheritance, you can create new classes built upon existing ones, allowing you to reuse fields and methods while adding new ones to the child class.
Why Do We Need Inheritance?
- Code Reusability: Avoid writing duplicate code by reusing fields and methods from existing classes.
- Method Overriding & Runtime Polymorphism: Easily customize inherited behavior to achieve runtime polymorphism.
Syntax & Real-World Example
To inherit from a class in Java, use the extends keyword:
class SoftwareEngineer extends Employee {
// SoftwareEngineer inherits salary, run(), walk()
// Plus adds bonus and talkAboutJava()
}
// SoftwareEngineer inherits salary, run(), walk()
// Plus adds bonus and talkAboutJava()
}
In this example:
- Employee is the Superclass (Parent Class).
- SoftwareEngineer is the Subclass (Child Class) that inherits all properties and methods from Employee.
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| Java Tutorial : Inheritance in Java |
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| Java Tutorial : Inheritance in Java |
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| Java Tutorial : Inheritance in Java |
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