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Day 19: Interfaces - HackerRank 30 days of code solution

Objective Today, we're learning about Interfaces. Check out the  Tutorial  tab for learning materials and an instructional video! Task The  AdvancedArithmetic  interface and the method declaration for the abstract  divisorSum(n)  method are provided for you in the editor below. Complete the implementation of  Calculator  class, which implements the  AdvancedArithmetic  interface. The implementation for the  divisorSum(n)  method must return the sum of all divisors of  . Input Format A single line containing an integer,  . Constraints Output Format You are not responsible for printing anything to stdout. The locked template code in the editor below will call your code and print the necessary output. Sample Input 6 Sample Output I implemented: AdvancedArithmetic 12 Explanation The integer   is evenly divisible by  ,  ,...
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Day 17: More Exceptions - HackerRank 30 days of code solution

Objective Yesterday's challenge taught you to manage exceptional situations by using  try  and  catch  blocks. In today's challenge, you're going to practice throwing and propagating an exception. Check out the  Tutorial  tab for learning materials and an instructional video! Task Write a  Calculator  class with a single method:  int power(int,int) . The  power  method takes two integers,   and  , as parameters and returns the integer result of  . If either   or   is negative, then the method must throw an exception with the message:  n and p should be non-negative . Note:  Do not use an access modifier (e.g.: public) in the declaration for your  Calculator  class. Input Format Input from stdin is handled for you by the locked stub code in your editor. The first line contains an integer,  , the number of test cases. Each of the   subseq...
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Day 21: Generics - HackerRank 30 days of code solution

Objective Today we're discussing Generics; be aware that  not all languages support this construct , so fewer languages are enabled for this challenge. Task Write a single generic function named  printArray ; this function must take an array of generic elements as a parameter (the exception to this is C++, which takes a  vector ). The locked  Solution  class in your editor tests your function. Note:  You must use generics to solve this challenge.  Do not  write overloaded functions. Input Format The locked  Solution  class in your editor will pass different types of arrays to your  printArray  function. Constraints You must have exactly   function named  printArray . Output Format Your  printArray  function should print each element of its generic array parameter on a new line. Solution : import java.util.*; class Printer <T> {  ...
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