Hello Programmers, In this post, you will know how to solve the Can You Access HackerRank Solution. This problem is a part of the HackerRank Java Programming Series.
One more thing to add, don’t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.
Can You Access HackerRank Solution
Objective
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.
Constraints
1<=num<=2power30
Sample Input
8
Sample Output
8 is power of 2
An instance of class: Solution.Inner.Private has been createdCan You Access Hacker Rank Solutions
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);
}
}Disclaimer: The above Problem (Can You Access) is generated by Hackerrank but the Solution is Provided by BrokenProgrammers. This tutorial is only for Educational and Learning purposes.