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HackerRank Java Inheritance II problem solution

YASH PAL, 31 July 2024

In this HackerRank Java Inheritance II problem in the java programming language you need to write the following two classes:

  1. A class named Arithmetic with a method named add that takes 2 integers as parameters and returns an integer denoting their sum.
  2. A class named Adder inherits from a superclass named Arithmetic.

Your classes should not be public.

HackerRank Java Inheritance II problem solution

HackrRank Java Inheritance II problem solution.

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

//Write your code here
class Arithmetic{
    public int add(int a, int b){
        int sum = a + b; 
        return sum;
    }
}

class Adder extends Arithmetic{  
    public int callAdd(int a, int b){
        return add(a, b);
    }
}

public class Solution{
    public static void main(String []args){
        // Create a new Adder object
        Adder a = new Adder();
        
        // Print the name of the superclass on a new line
        System.out.println("My superclass is: " + a.getClass().getSuperclass().getName());  
        
        // Print the result of 3 calls to Adder's `add(int,int)` method as 3 space-separated integers:
        System.out.print(a.add(10,32) + " " + a.add(10,3) + " " + a.add(10,10) + "n");
     }
}



Second solution

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

class Arithmetic {
    Arithmetic() {}
}

class Adder extends Arithmetic {
    Adder() {}
    
    int add(int a, int b) {
        return a + b;
    }
}


public class Solution{
    public static void main(String []args){
        // Create a new Adder object
        Adder a = new Adder();
        
        // Print the name of the superclass on a new line
        System.out.println("My superclass is: " + a.getClass().getSuperclass().getName());  
        
        // Print the result of 3 calls to Adder's `add(int,int)` method as 3 space-separated integers:
        System.out.print(a.add(10,32) + " " + a.add(10,3) + " " + a.add(10,10) + "n");
     }
}

The solution in Java 8 programming.

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

class Arithmetic {
    Arithmetic() {}
}

class Adder extends Arithmetic {
    Adder() {}
    
    int add(int a, int b) {
        return a + b;
    }
}

public class Solution{
    public static void main(String []args){
        // Create a new Adder object
        Adder a = new Adder();
        
        // Print the name of the superclass on a new line
        System.out.println("My superclass is: " + a.getClass().getSuperclass().getName());  
        
        // Print the result of 3 calls to Adder's `add(int,int)` method as 3 space-separated integers:
        System.out.print(a.add(10,32) + " " + a.add(10,3) + " " + a.add(10,10) + "n");
     }
}
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