Valid Username Regular Expression Solution Hackerrank – Java Solution

Valid Username Regular Expression Solution Hackerrank – Java Solution

Problem Name – Valid Username Regular Expression
Problem Link –  Valid Username Regular Expression
Level – String

Java Only Submitted Code

class UsernameValidator {
    public static final String regularExpression = "([a-zA-Z])(\w){7,29}";
}

Java Full Source 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");
            }           
        }
    }
}

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