题解 | #邮箱验证#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str = scanner.next();
        String emailMatcher = "[a-zA-Z0-9]+@[a-zA-Z0-9]+\\.[a-zA-Z0-9]+";
        if (str.matches(emailMatcher)) {
            System.out.println("邮箱格式合法");
        } else {
            System.out.println("邮箱格式不合法");
        }
        

    }
}