Java regex email

Question

First of all, I know that using regex for email is not recommended but I gotta test this out.

I have this regex:

\\b[A-Z0-9._%-]+@[A-Z0-9.-]+\\.[A-Z]         


        

Answer 1

import java.util.Scanner;

public class CheckingTheEmailPassword {

    public static void main(String[] args) {
        String email = null;
        String password = null;
        Boolean password_valid = false;
        Boolean email_valid = false;

        Scanner input = new Scanner(System.in);
        do {
            System.out.println("Enter your email: ");
            email = input.nextLine();

            System.out.println("Enter your passsword: ");
            password = input.nextLine();

            // checks for words,numbers before @symbol and between "@" and ".".
            // Checks only 2 or 3 alphabets after "."
            if (email.matches("[\\w]+@[\\w]+\\.[a-zA-Z]{2,3}"))
                email_valid = true;
            else
                email_valid = false;

            // checks for NOT words,numbers,underscore and whitespace.
            // checks if special characters present
            if ((password.matches(".*[^\\w\\s].*")) &&
            // checks alphabets present
                    (password.matches(".*[a-zA-Z].*")) &&
                    // checks numbers present
                    (password.matches(".*[0-9].*")) &&
                    // checks length
                    (password.length() >= 8))
                password_valid = true;
            else
                password_valid = false;

            if (password_valid && email_valid)
                System.out.println(" Welcome User!!");
            else {
                if (!email_valid)
                    System.out.println(" Re-enter your email: ");
                if (!password_valid)
                    System.out.println(" Re-enter your password: ");
            }

        } while (!email_valid || !password_valid);

        input.close();

    }

}