Simple Example for overloading and overriding

overloading:

ConstructorOverloading.java:

package com.core.Polymorphism.overloading;

public class ConstructorOverloading

{

int a,b;

ConstructorOverloading(){

a=1;

b=2;

}

ConstructorOverloading(int v1, int v2){

a=v1;

b=v2;

}

void sum(){

System.out.println("Sum is : "+(a+b));

}

}

FunctionOverloading.java

package com.core.Polymorphism.overloading;

public class FunctionOverloading

{

void add(int a, int b){

System.out.println("Sum if int is : "+(a+b));

}

void add(double a, int b){

System.out.println("Sum double and int is : "+(a+b));

}

void add(String a, String b){

System.out.println("Combination of String is "+(a+b));

}

}

Overloading.java

package com.core.Polymorphism.overloading;

public class Overloading

{

public static void main (String args[]){

    FunctionOverloading functionOverloading= new FunctionOverloading();

    functionOverloading.add(1, 1);

    functionOverloading.add(1.0000, 1);

    functionOverloading.add("Nagendra", "Kumar");

   

    ConstructorOverloading constructorOverloading = new ConstructorOverloading();

    constructorOverloading.sum();

    ConstructorOverloading constructorOverloading2 = new ConstructorOverloading(10,10);

    constructorOverloading2.sum();

   

}

}

OutPut:

Sum if int is : 2

Sum double and int is : 2.0

Combination of String is NagendraKumar

Sum is : 3

Sum is : 20

Overriding

Sum.java:

package com.core.Polymorphism.Overriding;

public class Sum {

public void sum(int a , int b){

System.out.println("Super class sum: "+(a+b));

}

}

MethodOverriding.java:

package com.core.Polymorphism.Overriding;

public class MethodOverriding extends Sum{

public void sum(int a, int b){

System.out.println("MethodOverriding : Sum of two number is : "+(a+b));

}

public void sum(){

System.out.println("Sum method in MethodOverrinding");

}

}

Overriding.java:

package com.core.Polymorphism.Overriding;

public class Overriding {

public static void main (String args[]){

Sum  sum = new MethodOverriding();

sum.sum(1, 1);

Sum sum2= new Sum();

sum2.sum(1, 1);

}

}

OutPut:

MethodOverriding : Sum of two number is : 2

Super class sum: 2