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]+";

        //write your code here......
        if(str.matches(emailMatcher))
        System.out.println("邮箱格式合法");
        else
        System.out.println("邮箱格式不合法");
/*System.out.println(str.matches(emailMatcher)?邮箱格式合法:邮箱格式不合法);*/
    }
}

利用matches()方法对输入的字符串与正则表达式进行正则匹配。