package langu;
import java.util.Scanner;
public class 判断邮箱 {
public static void main(String[] args) {
Scanner scanner=new Scanner(System.in);
System.out.println("请输入邮箱:");
String s=scanner.next();
String reg="\\w+[@]{1}+[sina]{4}\\.com";//正则表达式,验证以新浪邮箱为例
if (s.matches(reg)) {
System.out.println("邮箱输入正确");
}else {
System.out.println("邮箱输入格式错误");
}
}
}