题解 | #邮箱验证#

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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]+";

        //write your code here......
       Pattern pat = Pattern.compile(emailMatcher);
       Matcher mat = pat.matcher(str);

        boolean isValid = false;
        while(mat.find()) {
            System.out.println("邮箱格式合法");
            isValid = true;
        }
        if(!isValid){
            System.out.println("邮箱格式不合法");
        }


        scanner.close();

    }
}