邮箱验证

package cn.check.com;

import java.util.Scanner;

public class CheckMail {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入邮箱:");
        String mail = sc.nextLine();

        // String
        // scanmail="[a-zA-Z_0-9]+@[a-zA-Z_0-9]{2,6}(\\.[a-zA-Z_0-9]{2,3})+";//{2,6}2-6个字符,
        // //(\\.[a-zA-Z_0-9]{2,3})+有的时候,123@qq.com.cn需要用()+来才有效果
        String scanmail = "\\w+@\\w{2,6}(\\.\\w{2,3})+";
        boolean flag = mail.matches(scanmail);
        System.out.println(flag);
    }

}