How is inheritance implemented in Java?

 

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Inheritance in Java is a key concept of Object-Oriented Programming (OOP) that allows a class to acquire the properties and behaviors (fields and methods) of another class. It helps in code reusability, method overriding, and establishing relationships between classes.

In Java, inheritance is implemented using the extends keyword.

🔹 Types of Inheritance in Java:

Single Inheritance – One subclass inherits from one superclass.

Multilevel Inheritance – A class inherits from a derived class.

Hierarchical Inheritance – Multiple classes inherit from a single parent class.

Note: Java does not support multiple inheritance with classes to avoid ambiguity, but it can be achieved using interfaces.

🔹 Syntax:

java

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class Animal {

    void eat() {

        System.out.println("This animal eats food");

    }

}

class Dog extends Animal {

    void bark() {

        System.out.println("Dog barks");

    }

}

In the above example, Dog inherits the eat() method from Animal using the extends keyword.

🔹 super Keyword:

Used to call the parent class's constructor or methods.

java

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super.eat(); // Calls eat() from Animal class

🔹 Method Overriding:

Subclass can override parent class methods to provide specific implementation.

java

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@Override

void eat() {

    System.out.println("Dog eats bones");

}

🔹 Advantages of Inheritance:

Code Reusability

Method Overriding for Polymorphism

Improved Maintainability

Logical Hierarchy Representation

In summary, inheritance in Java is implemented using the extends keyword, allowing one class to inherit features from another, enabling cleaner, reusable, and organized code.

Read more: 

What is encapsulation?

Classes and Objects in Java Explained

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Read more: 

What are the main principles of Object-Oriented Programming?

Classes and Objects in Java Explained

Visit  Quality Thought Training Institute in Hyderabad