JavaExceptionHandling.java

// https://www.hackerrank.com/challenges/java-exception-handling/problem

import java.util.Scanner;

public class JavaExceptionHandling {
 public static final MyCalculator MY_CALCULATOR = new MyCalculator();
 public static final Scanner SCANNER = new Scanner(System.in);

 public static void main(String[] args) {
 while (SCANNER.hasNextInt()) {
 int n = SCANNER.nextInt();
 int p = SCANNER.nextInt();

 try {
 System.out.println(MY_CALCULATOR.power(n, p));
 } catch (Exception e) {
 System.out.println(e);
 }
 }
 }

 private static class MyCalculator {
 public long power(int base, int power) throws Exception {
 if (base == 0 && power == 0) {
 throw new Exception("n and p should not be zero.");
 } else if (base < 0 || power < 0) {
 throw new Exception("n and p should not be negative.");
 }

 long result = 1;
 for (int i = 0 ; i < power ; i++) {
 result *= base;
 }
 return result;
 }
 }
}