JavaProgramming/HackerRank/TwentyEight.java at main · karterhhgg/JavaProgramming · GitHub

27 lines (22 loc) · 700 Bytes

package HackerRank;

import java.util.Scanner;

class UsernameValidator {

* Write regular expression here.

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

}

public class TwentyEight {

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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