Valid Username Regular Expression – Hacker Rank Solution ~ Multiplex Coder

Objective

You are updating the username policy on your company’s internal networking platform. According to the policy, a username is considered valid if all the following constraints are satisfied:

The username consists of to characters inclusive. If the username consists of less than 8 or greater than 30 characters, then it is an invalid username.

Problem Statement: Click Here

Valid Username Regular Expression – Hacker Rank Solution

Code:

import java.util.Scanner;

class UsernameValidator {

public static final String regularExpression = "^[a-zA-Z][\\w]{7,29}$";

}

public class Solution {

private static final Scanner scan = new Scanner(System.in);

public static void main(String[] args) {

int n = Integer.parseInt(scan.nextLine());

while (n-- != 0) {

String userName = scan.nextLine();

if (userName.matches(UsernameValidator.regularExpression))

System.out.println("Valid");

else

System.out.println("Invalid");

}

Disclaimer: The above Problem (Valid Username Regular Expression ) is generated by Hackerrank but the Solution is Provided by MultiplexCoder. This tutorial is only for Educational and Learning purposes.

Valid Username Regular Expression – Hacker Rank Solution

Objective

Valid Username Regular Expression – Hacker Rank Solution

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