题解 | #邮箱验证#

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