HR자바 Valid Username Regular Expression

개요

HR자바 Valid Username Regular Expression

• https://www.hackerrank.com/challenges/valid-username-checker/problem

해커랭크 Java

#	문제	비고
HR자바 Strings e
14	HR자바 Java Strings Introduction
15	HR자바 Java Substring
16	HR자바 Java Substring Comparisons
17	HR자바 Java String Reverse
18	HR자바 Java Anagrams
19	HR자바 Java String Tokens
20	HR자바 Pattern Syntax Checker
21	HR자바 Java Regex
22	HR자바 Java Regex 2 - Duplicate Words
23	HR자바 Valid Username Regular Expression
24	HR자바 Tag Content Extractor

---

import java.util.Scanner;

class UsernameValidator {
    /*
     * Write regular expression here.
     */
    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");
            }           
        }
    }
}