Can You Access Java

03 Dec Can You Access Java

Hello Friends, How are you? Today I will solve the HackerRank Java Can You Access – Problem with a straightforward explanation. In this article, you will get more than one approach to solve this problem. So let’s start- {tocify} $title={Table of Contents} You are given a class Solution and an inner class Inner.Private. The main method of class Solution takes an integer num as input. The powerof2 in class Inner.Private checks whether a number is a power of 2. You have to call the method powerof2 of the class Inner.Private from the main method of the class Solution.

8 {codeBox}

8 is power of 2 An instance of class: Solution.Inner.Private has been created {codeBox}

Java Can You Access HackerRank Solution Approach I: Java Can You Access – Solution HackerRank

// ========================
// Information
// ======================== // Name: Java Can You Access HackerRank Problem
// Direct Link: https://www.hackerrank.com/challenges/can-you-access/problem
// Difficulty: Medium
// Max Score: 15
// Language: Java 7 // ========================
// Solution Start
// ======================== // Java Can You Access - Hacker Rank Solution Start import java.io.*;
import java.lang.reflect.*;
import java.util.*;
import java.util.regex.*;
import java.security.*; public class Solution { public static void main(String[] args) throws Exception { DoNotTerminate.forbidExit(); try{ BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int num = Integer.parseInt(br.readLine().trim()); Object o; // Must be used to hold the reference of the instance of the class Solution.Inner.Private o = new Inner().new Private();
System.out.println(""+num+" is "+((Inner.Private)o).powerof2(num)); System.out.println("An instance of class: " + o.getClass().getCanonicalName() + " has been created"); }//end of try catch (DoNotTerminate.ExitTrappedException e) { System.out.println("Unsuccessful Termination!!"); } }//end of main static class Inner{ private class Private{ private String powerof2(int num){ return ((num&num-1)==0)?"power of 2":"not a power of 2"; } } }//end of Inner }//end of Solution class DoNotTerminate { //This class prevents exit(0) public static class ExitTrappedException extends SecurityException { private static final long serialVersionUID = 1L; } public static void forbidExit() { final SecurityManager securityManager = new SecurityManager() { @Override public void checkPermission(Permission permission) { if (permission.getName().contains("exitVM")) { throw new ExitTrappedException(); } } }; System.setSecurityManager(securityManager); }
} // Java Can You Access Hacker Rank Solution END
// MyEduWaves

Approach II: Java Can You Access – Solution HackerRank

// ========================
// Information
// ======================== // Name: Java Can You Access HackerRank Problem
// Direct Link: https://www.hackerrank.com/challenges/can-you-access/problem
// Difficulty: Medium
// Max Score: 15
// Language: Java 7 // ========================
// Solution Start
// ======================== // Java Can You Access - Hacker Rank Solution Start import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.security.Permission; public class Solution { public static void main(String[] args) throws Exception { Do_Not_Terminate.forbidExit(); try { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int num = Integer.parseInt(br.readLine().trim()); Object o; // Must be used to hold the reference of the instance of // the class Solution.Inner.Private Inner inner = new Inner(); Inner.Private p = inner.new Private(); System.out.println(num + " is " + p.powerof2(num)); o = p; System.out.println("An instance of class: " + o.getClass().getCanonicalName() + " has been created"); } // end of try catch (Do_Not_Terminate.ExitTrappedException e) { System.out.println("Unsuccessful Termination!!"); } }// end of main static class Inner { private class Private { private String powerof2(int num) { return ((num & num - 1) == 0) ? "power of 2" : "not a power of 2"; } } }// end of Inner }// end of Solution class Do_Not_Terminate { public static class ExitTrappedException extends SecurityException { private static final long serialVersionUID = 1L; } public static void forbidExit() { final SecurityManager securityManager = new SecurityManager() { @Override public void checkPermission(Permission permission) { if (permission.getName().contains("exitVM")) { throw new ExitTrappedException(); } } }; System.setSecurityManager(securityManager); }
} // Java Can You Access Hacker Rank Solution END
// MyEduWaves