Method Overloading And Method Overriding

Method Overloading and Method Overriding are two key concepts in object-oriented programming (OOP), used to achieve polymorphism.

Method Overloading:

• Definition: Method overloading occurs when multiple methods in the same class have the same name but differ in the type or number of parameters.
• Purpose: It allows a class to have more than one method with the same name, making the methods easier to read and use based on varying input types.
• Compile-time Polymorphism: Overloading is resolved during compile time.

class MathOperations {
    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;
    }
}

Method Overriding:

• Definition: Method overriding occurs when a subclass provides a specific implementation for a method that is already defined in its superclass.
• Purpose: It is used to define behavior that is specific to the subclass, making the superclass’s method more flexible for various implementations.
• Runtime Polymorphism: Overriding is resolved during runtime, allowing the Java Virtual Machine (JVM) to invoke the appropriate method.

class Animal {
    void sound() {
        return something;
    }
}

class Dog extends Animal {
    void sound() {
        return something;
    }
}

Key Differences: