Covariant Return Types Hacker Rank Solution

Hello coders, In this post, you will learn how to solve Covariant Return Types Hacker Rank Solution. This problem is a part of the Java programming series. One more thing to add, don’t straight away look for the solutions, first try to solve the problems by yourself. If you find any difficulty after trying several times, then look for the solutions.

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Covariant Return Types Hacker Rank Solution
Covariant Return Types – Hacker Rank Solution

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Covariant Return Types Hacker Rank Solution

Objective

Java allows for Covariant Return Types, which means you can vary your return type as long you are returning a subclass of your specified return type.

Method Overriding allows a subclass to override the behavior of an existing superclass method and specify a return type that is some subclass of the original return type. It is best practice to use the @Override annotation when overriding a superclass method.

Implement the classes and methods detailed in the diagram below:

Covariant Return Types Hacker Rank Solution

You will be given a partially completed code in the editor where the main method takes the name of a state (i.e., WestBengal, or AndhraPradesh) and prints the national flower of that state using the classes and methods written by you.

Note: Do not use access modifiers in your class declarations.

Resources
Covariant Return Type
Java Covariant Type

Input Format

The locked code reads a single string denoting the name of a subclass of State (i.e., WestBengalKarnataka, or AndhraPradesh), then tests the methods associated with that subclass. You are not responsible for reading any input from stdin.

Output Format

Output is handled for you by the locked code, which creates the object corresponding to the input string’s class name and then prints the name returned by that class’ national flower’s whatsYourName method. You are not responsible for printing anything to stdout.

Sample Input 0

AndhraPradesh

Sample Output 0

Lily

Explanation 0

An AndhraPradesh object’s yourNationalFlower method returns an instance of the Lily class, and the Lily class’ whatsYourName method returns Lily, which is printed by the hidden code checker.



Covariant Return Types Hacker Rank Solution

package com.javaaid.hackerrank.solutions.languages.java.advanced;
public class CovariantReturnTypes {
  /**
   * main code starts from here** */
  class Flower {
    public String whatsYourName() {
      return "I have many names and types.";
    }
  }
  class Jasmine extends Flower {
    public String whatsYourName() {
      return "Jasmine";
    }
  }
  class Lily extends Flower {
    public String whatsYourName() {
      return "Lily";
    }
  }
  class Lotus extends Flower {
    public String whatsYourName() {
      return "Lotus";
    }
  }
  class State {
    Flower yourNationalFlower() {
      return new Flower();
    }
  }
  class WestBengal extends State {
    Jasmine yourNationalFlower() {
      return new Jasmine();
    }
  }
  class Karnataka extends State {
    Lotus yourNationalFlower() {
      return new Lotus();
    }
  }
  class AndhraPradesh extends State {
    Lily yourNationalFlower() {
      return new Lily();
    }
    /**
     * main code ends here  */
  }
}

Disclaimer: The above Problem (Covariant Return Types ) is generated by Hackerrank but the Solution is Provided by Chase2Learn. This tutorial is only for Educational and Learning purposes. Authority if any of the queries regarding this post or website fill the following contact form thank you.

FAQ:

1. HackerRank Java All Problems Solutions

Hackerrank java problems solutions with practical program code examples and step-by-step full complete explanation.

2. Can HackerRank learn Java?

Welcome to the world of Java! In this challenge, we practice printing to stdout. The code stubs in your editor declare a Solution class and the main method. 

3. What is HackerRank Java test?

The HackerRank Skills Certification Test is a standardized assessment to help developers prove their coding skills.

4. Should I put HackerRank certificate on resume?

These certificates are useless, and you should not put them on your resume. The experience you gained from getting them is not useless. Use it to build a portfolio, and link to it on your resume. 

5. Can I retake HackerRank test?

The company which sent you the HackerRank Test invite owns your Test submissions and results. It’s their discretion to permit a reattempt for a particular Test. If you wish to retake the test, we recommend that you contact the concerned recruiter who invited you to the Test and request a re-invite

6. Can I learn Java per month?

you can’t master it in 1 month, it needs continuous hard work and experience. JAVA is a vast language even developers don’t know fully. you go in-depth about each particular class in java. Java is such a platform which have been used in all platform like android, web, and cloud so keep working on your interest. 

Where can I find HackerRank solutions in Java?

in this post you will get all the solutions of HackerRank java Problems.

Finally, we are now, in the end, I just want to conclude some important message for you

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