Method Overloading vs Method Overriding in Java – Complete Polymorphism Explanation

By Bhau Automation • Learn Method Overloading and Overriding in Java (Hindi & English)

🎯 What You Will Learn in This Video

• What is Polymorphism in Java?
• Understanding Method Overloading and Overriding
• Compile-time vs Runtime Polymorphism
• Rules and Examples of Overloading and Overriding
• Key differences between both with real examples
• Hindi + English explanation for better understanding

💡 Pro Tip: Polymorphism in Java is one of the core OOP concepts that allows methods to behave differently based on their input or object type.

📘 What is Polymorphism?

Polymorphism in Java means "many forms." It allows the same method name to perform different actions depending on the context — achieved through Method Overloading and Method Overriding.

🔹 Method Overloading (Compile-Time Polymorphism)

When two or more methods in the same class have the same name but different parameters (type, number, or order), it’s called Method Overloading.

class Calculator {
    int add(int a, int b) {
        return a + b;
    }

    double add(double a, double b) {
        return a + b;
    }

    int add(int a, int b, int c) {
        return a + b + c;
    }
}

public class OverloadingExample {
    public static void main(String[] args) {
        Calculator calc = new Calculator();
        System.out.println(calc.add(10, 20));
        System.out.println(calc.add(5.5, 4.5));
        System.out.println(calc.add(1, 2, 3));
    }
}
  

💡 Output

30
10.0
6
  

🔸 Method Overriding (Runtime Polymorphism)

Method Overriding occurs when a subclass provides a specific implementation of a method already defined in its parent class.

class Animal {
    void sound() {
        System.out.println("Animal makes sound");
    }
}

class Dog extends Animal {
    void sound() {
        System.out.println("Dog barks");
    }
}

public class OverridingExample {
    public static void main(String[] args) {
        Animal a = new Dog(); // Runtime polymorphism
        a.sound();
    }
}
  

💡 Output

Dog barks
  

🧠 Key Differences Between Overloading and Overriding

🎥 Watch the Complete Video Tutorial

👉 Watch on YouTube: Method Overloading vs Overriding in Java | Bhau Automation

🎓 Key Takeaways

• Overloading is resolved at compile-time; overriding at runtime.
• Overriding requires inheritance; overloading does not.
• Method names must be identical for both.
• Overloading increases code readability and flexibility.
• Overriding provides specific behavior for a subclass.

⚡ Next Steps: Practice writing both overloaded and overridden methods and observe how polymorphism works during compilation and runtime.

🚀 Created with ❤️ by Bhau Automation