🚀 Day 13 of My Automation Journey: Polymorphism – Method Overriding in Java

Today I learned about Method Overriding, which is part of Runtime Polymorphism in Java.

Method Overriding happens when a child class provides its own implementation of a method that is already defined in the parent class.

✔ Same method name
✔ Same parameters
✔ Different implementation in child class

💻 Example

Parent Class – RbiBank
package overriding;

public class RbiBank {

    void interestRate() {
        System.out.println("5% interest for fixed deposit upto 1 Lakh");
    }

}
Child Class – SbiBank

package overriding;

public class SbiBank extends RbiBank {

    @Override
    void interestRate() {
        System.out.println("10% interest for fixed deposit upto 1 Lakh");
    }

    public static void main(String[] args) {

        SbiBank sbi = new SbiBank();
        sbi.interestRate();

    }

}

📊 Output

10% interest for fixed deposit upto 1 Lakh

Here the SbiBank class overrides the method of RbiBank, so the child class implementation executes.

🔗 Relationship

RbiBank (Parent Class)
        ↑
     SbiBank (Child Class)

This demonstrates Inheritance + Method Overriding.

🎯 Key Points Learned

✔ Child class overrides parent method
✔ Used for Runtime Polymorphism
✔ Method name and parameters must be same
✔ @override annotation improves readability
✔ Helps build flexible and reusable code

📚 What I’ll Learn Tomorrow
🔐 Encapsulation

Topic:

Data Protection
Private variables
Getter & Setter methods

👨‍🏫 Trainer: Nantha from Payilagam

🤖 A Small Note
I used ChatGPT to help structure and refine this blog while ensuring the concepts remain aligned with my trainer’s explanations.