Overloading & Overriding in Java

Published on Nov 06, 2022

Overloading

In Java, two or more methods have the same name but different types of parameters, a different number of parameters, or both. These methods are called overloaded methods and called method overloading.

For Example

void add (int a, int b) { }

void add (int a, float b) {}

double add (float a, double b) { }

int add(int a, int b, int c) { }

Here the return types of the add () function are different. Because overloading is not associated with the return types, overloaded methods may have the same or different return types, but they must differ in the parameters.

Example of Method Overloading

package uk.lset.overloading;

public class MethodOverloading {

public void add(int a,int b)

{

System.out.println(“The Addition of two numbers is :” +(a+b));

}

public void add(int a,int b,int c)

{

System.out.println(“The Addition of three numbers is :” + (a+b+c));

}

public void add(float a,int b)

{

System.out.println(“The Addition of two double numbers is :” + (a+b));

}

public void add(double a,int b)

{

System.out.println(“The Addition of two double numbers is :” + (a+b));

}

public static void main(String[] args) {

MethodOverloading obj=new MethodOverloading();

obj.add(10.0,20);

obj.add(11.5, 20);

obj.add(50,70);

obj.add(20,30,70);

}

}

package uk.lset.override;

public class Animal {

public void disply()

{

System.out.println(“I am an animal”);

}

}

package uk.lset.override;

public class Dog extends Animal {

public void display()

{

super.disply();

System.out.println(“I am dog i can bark”);

}

}

package uk.lset.override;

public class Main {

public static void main(String[] args) {

Dog obj=new Dog();

obj.display();

}

}

The super keyword in overriding helps us to access the method of superclass from the subclass after overriding.

The differences between Method Overloading and Method Overriding in Java are as follows: